The top 5 things I hate.

1.) End Game content is none lenient.
1 person messing up leads to wipes or 1 mistake gets you killed in which will eventually induce a wipe. Hated this model since WoW and I just don't see a positive to this design in the long run since it always causes confliction and negativity.

2.) Summoners Egi
Why oh why is all I gotta say.

3.) Dragoons not having pet Dragon/Wyvern or at least having breath attacks.
Literally the 2 things that make the Dragoon job stand out for me. FFT and FFXI Dragoons are my favorites.

4.) Paladin's don't have access to Holy.
The one cool thing about Paladin's in the FF franchise that made it stand out for me.

5.) No 2H Sword DPS Job yet.
When will you have this FFXIV? Why do you deny me this guilty pleasure?