I haven't seen anything done with ATB a simple dynamic turn order wouldn't do better. Not only do I strongly dislike any kind of time pressure, you also get rid of the wait time between turns.

Maybe X2 does something a simple dynamic turn order could not, I honestly don't know. I got the game for free when buying X and only played it for like 10 minutes. After coming out of X thinking it had the best battle system out of any FF yet, I quit X2 after the first battle just for going back to ATB. That being said, I'd rather go back and try X2 again instead of playing XVI. I completely agree on action gameplay in FF being worse.