I do not consider myself a casual or hardcore player (i hate hardcore content).

1. Game is very casual-unfriendly: brayflox, titan, stone vigil and garuda are horrible and should not be put into story quests (SE could have done it like with sch WP quest).
2. Story should not require lv50 dungeons: i would like to finish watching the story, but have no desire to head-bash the wall of 50+ dungeons with continuous wipes.
3. There is nothing worthy to grind - no levels, no materials/items. I just run through the same locations every day for tribe dailies and never visit any other locations - my open world content ends on it.
4. There are no meaningful guilds. Common chat for chatterboxes is not a guild, people don't have any worthy benefits for being in one. As a result i see lots of 5-10 online guilds who will never get at least 200 stable online (like in other mmos with much less population). World feels small and very lone.
5. No trade and craft - just another absent feature. I don't visit any cities to check the market - only teleport between sylph and amal'ja maps for dailies, world feels smaller.
6. Low level dungeon runs feels frustrating because i cannot improve there - level sync means i will always be weak and run them as fast as a new player. I keep doing them for 4.5k gil rewards, but i think i am at my limit.
7. Combat is arcade type - i have to move my char to avoid scripted skills, like in 1980s console games. I do not play any games but rpg and rts, this arcade combat issue makes me feel like i am playing a nintendo 198x game, and is the biggest reason to stop playing after the sub time ends. I remember the only combat i ever had that is not arcade - whm lv50 quest, i thought i have to heal that npc through incoming damage and actually started trying to put top healing (but found out it was scripted too). I would like to improve my char like in other rpg games, but so far dungeons have a huge gap for rpg mistakes and a tiny gap for arcade mistakes. I would like combats to be a big rpg check first (using cooldowns in time or wipe, etc) and small arcade check 2nd (i play with 3-4k ping being in europe, how i am supposed to dodge 1-shot skills?).
8. No space to improve my character over the basic - everyone are in the same i90 gear: no variations, no builds, one character = one fixed role, which is boring and short-sighted.

I think solving these issues would make average players to stay longer and consider re-subbing for new content.