This is also my post from another thread, moving here. This is as reasonably perfect as i can think of (Apologize for not following the format, just copy pasting):
Redesign Eorzea
================
Redesign Eorzea completely, redo the zones so they feel much more adventurous:
varied in landscape - have a huge variety in landscape, waterfalls, sea, sand, desert, islands, jungles, marsh-lands, rocky lands. Not have one massive zone which is literally the same landscape from beginning to end.
Make sure players have a unique experience in every rank range, eg. 1-10 very different experience than 10-20, etc and each require you to venture. eg as in XI: Sandoria -> La Theine Plateau -> Valkurm Dunes -> Qufim -> Yuhtunga/Yhoater jungle, etc .. each area would feel rewarding and unique, adventurous and an accomplishment.
Caves and mines are very bland and dull, they need to be bigger, more open, more creativity and more life in them. As for eg. Ordelle's cave.
Nuke Gridania, redo from ground up, instead of a very boring and depressingly dark green repetitive maze, have it a brighter lively vast and open luscious forest, like Sanctuary of Zitah and Jugner forest, with waterfalls, have it transform in landscape from one area to other, reach a cliff, a seashore, an interesting cave that perhaps is a passage to seashore on the other side, etc.
Beast encampments need to be bigger and cover full regions, feel you're going into a dark danger zone, not just a small hut with 30 mobs surrounding it.
Abilities
================
Abolish complete list of abilities now, revamped from the ground up - too many redundant abilities which add little significance to the job.
Remove tier II of skills too as again they feel very redundant and waste of an ability.
Have a short simple clear yet effective list of abilities for each job, each very unique and they completely differ in animation/damage/style/importance.
10 meaningful and useful abilities better than 40 redundant abilities which take up space and hype.
Make sure players look forward to abilities when ranking up 'cause they're worth it.
Also make abilities job specific instead of having a mage and archer perform a concussive blow -.-
Have abilities pre-loaded into jobs when switching.
Job/Subjob system
================
Replace Armoury system with Job/Subjob system - Bring back the classical job based FF's. Only utilize 2 jobs at a time max so each player has something unique and limited in what they can offer and can feel pride in their job, instead of the salad roles we have now.
Animations
================
Make the weapon skills much more wild and thrilling instead of mostly duplicate animations with different color effects as with pug for eg. Each skill offer a different animation, somethin like light strike, pummel and flurry should each bring some new and different noticable animations. Bring some kicks in, more jumping, more creativity.
Also, somehow make each player the focus of the screen when they do their skills so each player can shine separately,have their 1-2 seconds of fame, instead of each executing without others taking much notice as it now. Makes it more rewarding, engaging and fun.
Sound Effects
================
These go hand in hand with the animations. Fists get a stronger painful blunt sound, swords slashing, polearm piercing, emphasize the sounds, it just completes the experience of the animations in a much nicer way.
Mobs
================
Less rats and more beastmen.
As there were, Gobs, orcs, yagudos. Would bring in some new beastmen and have them roaming around, each city has it's own unique beastmen. Instead of being infested with mice, mushrooms and fat dodo's.
Also, even the more aggresive mobs we currently have need a redesign, i can't help but feel they're skinny and wimpy looking, like the wolves. Make the aggresive mobs bigger in size and fatter. Amalj'aa are a positive example.
Other important point is having variety amongst the same species, would have a rank 30 look different and inferior to a rank 50 or 60 of the same species. Be it the form, body shape, size, horns, spikes, colors, movement, abilities. Should feel you're fighting something stronger and you gained that privilege by ranking up.
Better and more varied distribution, bring new shapes and forms of mobs and not have them duplicated all over Eorzea.
SKillchains
================
Bring the skillchains and bursts in, make the battle system more fun instead of button bashing. Perhaps have a new skillchain system, not sure how feasible it is, but somethin similar to what we have in console rpg's. Would be nice to see 2 players sync and have a unique animation and an aura around them to show they're performing a skillchain instead of just one person performing another skill after the other. Maybe introduce a whole new list of Skillchain abilities alongside the normal abilities, like in Chrono Trigger (2 and 3 person skillchains). Something new, cool and fun.
Transportation
================
Bring the various transportation methods, chocobos, airships, heck even flying dragons, bikes and other forms. Remove Anima system completely, still have teleportation available but not through Anima system. Through crystals, scrolls, magic. Have it make sense and a privilege to be able to teleport, not every tom, dick and harry.
Aetheryte camps
================
Completely redesign these camps. Have each camp different and unique based on the area it's in. increase the size of the camp, make it a nice unique experience. The crystal should increase in size to become a landmark , make players see it and it's Aura from far away and feel awe when around it. Make it a teleportation center and what ever else.
Missions
================
Abolish Leves and replace completely with missions. Have casuals gain their SP but in a fun manner, not a dull boring repetitive leve system. Make FF more mission and quest oriented instead of leves. Make people go out and see what Eorzea has to offer while gaining their SP.
Also make missions and quests more entertaining and challenging, tie them more with story and lore, not dull boring quests.
Music
================
Redo the music for alot, probably most areas.
Some tracks are quite good and need to stay but others are horrid. La Noscea has a nice theme and my favourite track which FFXIV excelled in is "Nail of the heavens" the battle theme of La Noscea, that's one beautifully composed track. More of this stuff.
Would bring in music similar to Sanctuary of Zitah, that was a masterpiece.
Many tracks here plain suck and feel like ancient squeaky atari style music, like behest and the r30 dungeon. There is this old-school atari theme happening and its rather annoying. Bring the drums, the bass, the flutes and destroy the midi style music. All previous FF's had beautiful music, can learn lot from them.
Auction House
================
Nuke the wards and put an Auction House.
Gear/Weapons
================
Make gear and weapons job specific. Remove optimal gear and make gear rank specific so players have a bigger incentive to work for. Also have way less generic gear and more job specific gear to set players apart. Have unique looks for all jobs.
Introduce significantly more gear and weapons.
Party
================
Enhance and simplify party search, make it much easier to party up so people start enjoying game together and meeting other people. Make it easy enough that even casuals can quickly get a party sorted and on their way to engage in battle and easily gain sp this way rather than leves. Casual play should be convenient but fun, party play should be encouraged for all.
UI
================
Completely redo the UI design. the gear, inventory, windows, icons. Looks ancient style now, make it more appealing, bigger size.
Make it very light-weight, easy to navigate, no lag.
Redo the chat window, something that works, similar to XI. it's too laggy and obscuring now. Have one easily type and navigate chat.
Content
================
Add much more content, exploration/adventure and fun activities.
Optimize
================
Optimize the game so it runs more efficiently and less hogging of resources and overheating.