Gonna have to disagree with Yoshi-P on an ability that remained after all the role action pruning and whatnot: Protect.
FC leader, who mains AST, passed along a macro that he had obtained, where it swaps out Protect for Swiftcast after it casts Protect, so you have all 5 role abilities freed in use for abilities that are actually useful, vs. having one of them bogged down with a button that you have to hit every 30 minutes at best. Yes, it prevents reapplying protect mid-battle, but I'd much rather have other useful tools on hand, even if they are niche. Thanks to this macro, now I can run my normal assortment of Esuna, Lagresse, Rescue, Swiftcast, and Lucid Dreaming; before I had to omit Rescue...which, while niche and not needing to be used often, is a more interesting ability to have than a passive buff that lasts 30 mins.
Per interviews I've seen/read, the dev team was fine with dropping Protect outright, but Yoshi-P insisted on it staying. To that, I say that if it were to remain, it should've been baked into the healing jobs by default, much like they have their own versions of Raise. Course, I would also say the same applies to Esuna as well.