Can we all agree that PvP like combos could be an option and you could either use it or keep one button : one ability ? Everyone is happy that way.

I'd like to see a bit more button consolidation where it's obviously the best option.
RDM : Impact should proc on Jolt (no one should use Jolt over Impact). VerHoly and VerFlare could proc on VerAero and VerThunder. But RDM does not suffer from button bloat.
SMN : Summon Bahamut could proc on Rouse (although Rouse is sometimes used when Bahamut is ready...) or DWT, and Akh Morn could replace Enkindle when the dergon is out. Technically, Bahamut turns off all pet interactions except Rouse, so there's some room there to overwrite some skills. Enkindle itself is annoying, I'd rather have the pet's "ultimate" as an ability like the other ones. Enkindle leads to awkward queueing in the pet's IA. Same with Devotion. DeathFlare could replace the DWT button too.
AST : Gravity could get something along the lines of Miasma II or Holy. An AoE DoT or a Stun / Slow for dungeons. I'd like something that willmake Synastry a bit more efficient. Like giving a small amount of heal as I DPS or something with our cards (sharing a monotarget card for instance). Because we heal very little with Benefic, so Synastry has a very limited use (Pantokrator II on the tanks if things go really bad)
WHM : rework lilies hard, or change the job's gauge entirely if needed. I don't need WHM as a buffer but why not, just like it could be a "BLM" healer and thus have CRAZY DPS and heals. That's not the case right now.
SCH : is fine, but the deployed shield with Largesse / Defiance / Convalescence / Nature's Minne / Mantra is getting out of hand in the end of the expansion haha. Largesse could just go back to WHM and that's be enough.
PLD : Flash should be merged with total eclipse (especially if we get rid of TP). Shield Lob and Shield Bash could be merged too. Could Sheltron have the added effect of Bulwark ? with a decreased gauge cost.
DRK : Darkside should be a trait, not a button. When in fight, you don't tick mana, when out of combat you get mana back. Dark Arts should be a buff with a duration, a small burst phase in OT and adds enmity if under Grit. Give it back Reprisal too.
BRD : have access to Diversion / anything please.
DRG : Heavy Thrust could be on impulse drive.