I hope they make savage dungeons rewards better, let me get savage gear from it please. The new deep dungeon would be nice if they added some more things to it as well that we can grind for ^^
I am happy with the relic as is, I don't want to grind my ass off for a weapon that is not even BiS until it is no longer relevant since the next expac is around the corner to make it redundant.
Further expansion of the island sanctuary to make it more like the farming sims it is imitating would also be nice.

I would say I hope for more content in future patches for next expansion once they are done with FFXVI but I expect they will still be working on DLC for a while and then probably idk.. the next mainline title already?