I think they should get rid of TP and make it that each class has it's own system. This would make classes/job more unique and you would feel a bigger difference when playing different classes. Would also make it for better more dynamic fights etc....
Edit: seems most of you need an example,
Well maybe not get rid of TP but maybe keep it for War and have other classes use different systems.
FFX, limit break all have the same gauge but once you execute it, they all have a different system, way of doing it. I don't know if you see my point....
WOW as an example, War got rage meter, Death Knight got their rune blade system, Rogues got a combo points system and etc..... S-E can come up with their own systems for each class.