what Quality of life improvements do you want?

[Packetdancer]

2) Numbers before party members: Some people might have an use for this (?) but it's just clutter information to me (this is not the enmity number)

I think it's mostly there for folks who use the function key shortcuts; if you need to top someone off real fast when healing (for instance), sometimes it's nice to have the number there at a glance so that you can see "Ah, that person is in position 5" and hit F5 without having to really parse the rest of the party list to see which position they're in (and thus which hotkey to hit). I agree it's probably useless outside of that scenario.

3) MP bar being changed for Ninki, Esprit, Heat, etc for the jobs that don't use MP

This is so much better in like 98% of scenarios... but then you get to Eureka or Bozja, and it is entirely possible that you could have a Logos/Lost action that uses MP on a job like NIN or MNK. I cannot think of any offhand, but I also can 100% believe it's the sort of thing they'd do in an exploratory zone at some point. I mean, as it is, with the right actions/essences/whatever you can have tanks be healers and healers be DPS and DPS be tanks and so on; having melee be casters seems pretty on-brand for the sort of wackiness you get in that content.

(Plus, the UX team really likes their pretty stylized/artistic job gauges; I suspect it would take a crowbar to pry them away from that design philosophy.)