Break the Trinity System Please

[ApolloGenX]

The only reason the design team can't do that currently is they can't rely on a certain class's skill to be present. Part of solving that is strengthening the existing design.

Why not? If two support roles branch off a single class, then there's no reason they can't. That would be requiring one of two jobs to be present. They do that with tanks and healers already. They can even have you choose which job, by making them use different stats, so you can't be both - forcing a choice like tanks and healers make (actually more of one, since you can't be both... but can be both tank or healer jobs)