IX's system is ok, I really dislike how it was implemented into the FFTA series though. I would have liked X-2's better if they toned down the useless relics like the Fire Ring that grants you the ability to cast Fire1 only. I also disliked the Garment Grids and their bonuses. For a game that supposedly offered a faster battle system they made you do alot of tedious things in battle. Still, it would be nice to see the system again if they fix some of the more tedious aspects about it.

Personally, I want to see FFT's version of the Job class implemented onto a game. XII's system showed we could even do the movement abilities as well.