I'm probably the exception, but I'd love to see an expansion of the Trust system. I'd like to take Trust companions into trials (not raids, just trials). Using the Trust system would be a great way for many players to learn the mechanics (just like in the dungeons), and there's certainly enough NPCs available to choose from for something like that. And for those that don't want to use the Trust system, you don't have to. It's always completely optional.

I'd also like to see Trust companions useable earlier in the game after the initial unlock (like for level 61-69 dungeons that squadrons don't cover). It would also be nice to have Trust NPCs fill in gaps for smaller groups that don't want to or don't have time to wait for a queue. Another option I would like to see is to be able to call chocobos out in dungeons to help battle.