It's not really a little request but it is outside of the usual big stuff we're likely to see.

I'd like to see a unification of the companion, squadron and trust systems. Let us bring a member of our Squadrons out into the world with us instead of our chocobo. Maybe even let us use our chocobo in a dungeon alongside the available Trust NPCs. Expand squadron levelling up through level 80 (90 in 6.0?) to match Trust levels. Let us take any combination of companions into Deep Dungeons with us. Etc. Just unify it all into one self contained system instead of having it as 3 different but similar systems that all feel disjointed and incomplete.