I'm not really sure why dps jobs are balanced on the basis of sub-role rather than simply across the board. It's fine to have jobs that are more selfish and ones that provide offensive buffs in lieu, but all that comes out in the wash with rdps, which should be equalized across all dps. Players come up with all sorts of arguments around 'difficulty' to justify retaining the advantages that their job has over others, but it's really in everyone's best interests to have a level playing field and let personal skill dictate who comes up on top.

I do think that 'utility' - by which I mean defensive and support-orientated actions - should be balanced independently of this and also needs to be looked at. Raise actions and magical raidwide mitigation are often worth their weight in gold, while physical raidwide mitigation tends to be more niche. It would be nice if every subrole had something equally valuable to offer in this regard.