I liked the old card system because it fit better with my concept of what an MMORPG healer should be. The challenge revolved around things like situational decision-making and adapting to circumstances. The new system's challenge is to quickly execute abilities in the proper sequence---in other words, AST cards are now a rotation, and that feels like a DPS mechanic to me.

Also, this isn't something where Stormblood really did any better, but I've always wanted nocturnal sect not to feel like a waste in dungeons.