From what I've tested with a friend this is what we we've come up with.

WAR:
Exceptional AoE Sustain, Okay Single Target sustain.
Great AoE Damage, Good Single Target Damage.
Buttons feel Satisfying to use.

PLD:
Great AoE Sustain, Good Single Target Sustain
Good AoE Damage, Bottom of the pack for Tank damage, still better then Healers.
Buttons feels good but is still strict on rotation for maximum performance

GNB:
Okay AoE Sustain, Great Single Target Sustain
Great AoE Damage, Great Single Target Damage
Buttons are fun to press but now you have to account for Double Down for No Mercy Window. Can feel good or bad depending on the player.

DRK:
Horrible AoE Sustain, Horrible Single Target Sustain. Shrugs off TBs but needs to be baby sat for eating boss Autos.
Great AoE Damage, Amazing Single Target Damage
Buttons still feel clunky and sometimes moves don't line up with Buffs. Having AD and CnS share CD feels bad. Has a very long downtime before they get to burst again and their burst phase can be hectic.