You can't "dismantle" the holy trinity.

There will always be people holding the aggro. Those people will always aim to have the highest survivability -> Most HP/DEF/EVA -> Tank
There will always be the people focusing on support -> Healer
and there will always be the people focusing on raw DPS

There is nothing wrong with the holy trinity. It will always exist in games. It even exists in freeform games like Champions Online (although the game has HUGE balancing issues). There is almost no way to get around the holy trinity in a game that wants you to work in a team.