I always do find that interesting that alot of people like to say "FFXIV needs to be like WoW or (Insert game here)". But then the people on those games Praise FFXIV for what it does.
(But of course point out things that can be improved)

Personally for me, I dont want the game to become more hardcore, but at the same time I think, and would like there to be more Tank and Healer Responsibility.
Id love more mechanics tailored to them to diversify the fights abit. Also I cant believe Im saying this,...but different arena shapes, and mechanics to go with that.
I cant say if this would hurt or improve the game, but thats something Id like in the future, even with just EX / Savage Content