Quote Originally Posted by Chiramu View Post
There are multiple MMORPGs breaking the Trinity mold. If they wanted to go for a FF feeling, they didn't have to go with the rest of them.
The only MMO that's doing well without the trinity, that I can think of, is GW2, and plenty of people here have mentioned dissatisfaction with that.

More importantly, the trinity is more important than just a trope that people are comfortable with. When you force people into playing a certain way, you can more finely tune an encounter to better suit a group's playstyle. If you cannot make an encounter that is viable for every group comp and have it be challenging unless roles are so homogenized that makeup matters little.