Very simple suggestion. Make macro'd abilities have the same action queuing that normal actions do.

If I use Cure without a macro, it will attempt to queue it up if I'm almost done casting my previous spell. IF I try to use Cure by having a "/ac "Cure" <t>" or any variation of target, it will NOT try to queue the spell.

Not queuing macro'd actions causes players to lose a lot of DPS/HPS because of their playstyle, which I don't think is right. It would be very simple to make the game take /ac commands the same way it takes the actual actions.