Break the Trinity System Please

[Gramul]

No, if you NEED a support class, it means you've weakened all your other classes simply to have a support class.

I dunno.
Are Tanks weaker for having to rely on Healers?
Are DD's weaker for not being able to take as many hits as a Tank?
Are Healers any weaker for not being able to attack as hard as DD's?

Mechanically they could just make it where you, as a solo character, where fully capable of fighting anything. The 3 role system is as arbitrary as any other RPG structure. The battles in this game are just designed around it.