My current fear is with the new expansion there will be new skills. Why? The introduction of double tap cross bars. Now I primarily play tank role because it's easier on controller, but I can't play DPS as well especially MCH.
Which got me thinking why not use the Gambit system from XII!?
http://finalfantasy.wikia.com/wiki/Gambits
Now you might be saying..well what --about macros? Don't. They suck and I don't see them updating them anytime soon or at all.
Some examples would be:
Self MP ≥ ??% Dark Arts
Tank HP ≤ 10% Benediction

I know Bad examples but you can see where I'm going with this. Less buttons the better.