Wouldn't this allow us to pick one of each type of DPS (physical ranged, caster, melee) instead of 2 out of three?

Feels more balanced IMO to have one of each and then compare each job within it's own role than trying to balance their effectiveness with jobs outside of the role.
Not that it would stop a most powerful comp group forming, but at least it's a job from each role?
Wouldn't it leave less people out of the group?

I dunno was just a thought. I know it would be a massive headache to implement and balance but has this been brought up before?

For reference FFXIV is my first MMO so I'm sorry if I'm being incredibly ignorant/naive. Just been on my brain so I thought I'd ask people who know better