Adding more attacks to the healers and more ways to meaningfully spend Job gauges. That is generally what I want.
And for AST, making all the cards actually good... While they were bland as just DPS buffs, they were all alzways usable in any situation. Now, only 1 of the 3 you get with a draw is a DPS buff, and on both Draws it's the only one that's guaranteed to be useful. And of the minor arcanas, Lady of the Crowns is kinda useless in general while Lord of the Crowns is very good.