I've only got the PLD at 80, and quite franky I don't mind them removing another 4-5 buttons from the PLD. I literally fill 3 rows of hotbars, with only 2 slots for markers ("1" and "2") and 1 for LB.
I consider this the bare minimum:
- 1 to turn on Iron Will that loves to turn itself off due to level syncs
- 7 role actions: all of them are used regularly
- 7 for core rotation: Fast Blade > Riot Blade > Royal Authority + Goring Blade + Atonement and Total Eclipse > Prominence
- 4 for mana dump: Requiescat > Holy Spirit + Holy Circle > Confiteor
- 2 for utility: Shield Lob + Intervene
- 2 off-GCD for weaving: Spirits Within + Circle of Scorn
- 6 cooldowns: FoF + Sentinel + Sheltron + Hallowed Ground + Divine Veil + Passage of Arms
- 3 others: Clemency, Cover, Intervention
A total of 32 buttons. Add to that Shield Bash, which comes in handy in very situational circumstances, but useful nonetheless, 2 markers, and a LB, and I have 36 buttons, exactly 3 full bars. One could perhaps say this is "perfect". Which it actually is, for me, as I actually do have 36 keybinds all accessible on my left hand without taking my little finger off the Shift key. But I do hope at level 90 they remove a couple of these.
I cannot bring myself to use "I didn't have it on my hotbar" as an excuse to failing a situation that I otherwise could have perfectly handled. I think that's failure not only as a team player, but also as a gamer.