Is 2 melee 1 caster 1 ranged going to be just expected from now on?

[Lyth]

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It's worth remembering that the way that we evaluate dps has changed since early Stormblood. Historically, your dps contribution was your own dps. So when DRG provided a 100% uptime damage buff to ranged, that permanently belonged to the ranged, not to the DRG that provided it. It's also worth remembering that the entire 'bow caster/gun caster' philosophy of Heavensward was built to offset the complaint that 'casters' had to do more work.

The delineation between physical and magical ranged dps benefits casters, not physical ranged. If you eliminated it and merged ranged into a single category, you'd have no way of justifying why a spellcaster should do more damage than a physical ranged because they'd all be members of the same group.