Honestly A self-sufficient system is a major negative in a mmo where group gameplay SHOULD be the focal point of the genre. Without a reason to rely on healers and tanks the game becomes honestly nothing but a giant fate throughout where everyone is doing thier own thing.

With that said XIV is horribly lacking as well as the trinity system is also pure garbage. Simply because the game is missing 2 elements which added alot of dept to the fights and the game as a whole.

Crowd Control (Enfeebling XI terms)
Support (Enhancing XI Terms)

Which were lost with the WoW revolution due to both those classes typically being horrible at being self sufficient. And no MCH and BRD are not support classes in XIV.

XIV needs to encompass the whole group based party system in my opinion, Increase raid size, and get rid of the stupid damage check for everything system.

Because atm the system we have is blah, and honestly GW2s model is probably the worst thing in the whole genre. It work in a single player RPG but not a mmorpg.

And for those saying the dmg would have to be drastic. Look to XI with BRD or Cor. They did next to no damage, but they were taken 100% over an extra DPS. Can also look at Rift. The problem with XIV atm is the game is shallow as hell, adding support and crowd control would help alleviate that problem. Complexity is what the game needs. Making it with no complexity is one of the major design flaws of this game.