Something I would really like is open world dungeons.

At the moment all dungeons are instanced and require a party to enter.
But what if, after you have cleared a dungeon duty, you could zone in and explore it.

There could still be mobs about, but maybe a bit less powerful so they can be possibly soloed (but a bit harder that overworld mobs).

And where the bosses were they can have FATE bosses pop every now and then.

We could have treasure map chests hidden in dungeons. Also mobs and fates for quests or stuff like zodiac books.

And hunt marks could be hiding out in dungeons.

The zones are there, surely it could be programmed so we could enter them like other open world zones.

This would make the world feel bigger and more exciting.