Give us back the old card system, with a few changes:
Spire and Ewer give physical and magic damage buffs instead of useless shit. Even with unbalanced DPS jobs in Duty Finder, you or the tank can always use one.
Return bole to some non-damage buff. You can always re-roll to get something useful for damage, but having one non-damage card gives variety and utility when you're progging or in shit groups.
No extended RR. All RR is single-target. This removes 90% of the balance problems with the old card system.
Give a 5-minute cooldown ability to stack the deck with double balance and RR, so that world-first and speedkill groups don't have to sit around waiting for a perfect pre-fight deck.
That would solve all of the old balance issues, and restore an interesting and unique class system that no longer exists in any MMORPG. If there are enough nu-AST diehards, then give the new healer job a similar mechanic.
Ideally we would also get back the old buff extensions, so we can once again go hogwild with 20 seconds of instant-cast Gravity on dungeon pulls. But I can get over that if we get our cards back. The great days of old are already being forgotten, and they must be reclaimed before all memory is lost. My poor Canopus is growing rusty...
