No, just no. I hated the Gambit system in FFXII and feel the current macro system is good enough - if you don't like pressing buttons then why are you even playing a game for? A game requires input from the player (i.e. you) - just having the program do everything automatically turns it into a simulation and not a game, you may as well just be watching a CG movie.

Really, the whole point of the gambit system was a concession for trying to implement an MMO-style battle system into a single player game, and it was set up specifically for the other characters in the party that the player was not controlling. And AI being what it is, means that your best laid plans will inevitably come crashing down just because the AI does something stupid at the worst possible time. I'm sorry to say, but no, it just would not work here in FFXIV.