TP moves are like abilities with a cost. I think what the OP is looking for is an alternate system that's more of a reward for meeting requirements like limit breaks in FFVII and FFIX (9 not 11) and a few others where you get a single special move that really changes the pace of the battle and makes your class shine like 2 hours in FFXI does, but in a different way. Not like weapon skills in FFXI, where you can use energy for a single insignificant special attack, then repeat.