More open world exploration

[Gormogon]

Personally I'd rather have Square-Enix take this route. Where locations in Eorza would have open world dungeons.

Sagolii Desert


Imagine there being an entrance. This zone having 3 levels and all being level 50 monsters.
1st floor: Soloable especially with a chocobo: hidden locations with chest pops with crafting mats or gil and some rare monsters here that drop 1,000gil. While the entrance area will be easy towards the end the mobs are more packed and more organized so clearing the end of the room as you want to get to the 2nd gets more difficult.
2nd floor: 4-man Party requirement: It's not needed to be in a party to navigate this zone. You may be able to clear some mobs here in the entrance if you have BiS gear but a couple mobs in you wont survive that easily. As a party there will be places you may want to explore to get chests that provide gil, pots, ventures. This zone will always have up to 3 Mini-Bosses that drop gil and semi-decent accessories.
3rd floor: Alliance requirement: Not needed to enter but it's recommended to navigate this area safely towards the MvP. The MvP in the zone is protected by the zones mob layout (Think Chimera Fate in North Thanalan but in a grander scale). It can drop a desirable piece of gear and every participant gets a platinum allagan pouch.

Boulder Down


Imagine this zone being massive the scale of CT and for the sake of diversity all monsters past 20% in the middle section already difficult enough that will require parties to clear.
The 3 Mini-Bosses could be separated in the opposite sides of the zone guarding chests of gil one of them guards the entrance to the area where the MvP is located. Killing the bosses could buff or debuff this zones MvP.

All in all we can take this set up and spread it out through Eorza and have many unique open world dungeons.
Big scaled, multiple layered, and labyrinth designed. With changes to visual designs. Climate, architectural, indoor, outdoor. Mobs that live here have a geological reason for being there. We can have a forest zone ruled by Malboro, a sunken labyrinth where worms and the undead have made their home, a frozen utopia where dragons and ogres reside, the possibilities are endless.

Personally I would rather have this model for open world over one that relies on fates.