The way Speed is calculated would have to be completely reworked, but otherwise ATB plays quite similarly to turn-based systems but if you hesitate when picking an attack the enemy might get an additional attack in on you. If GF ever attempt to copy an FF battle system I hope they’d go for FFX’s system over the ATB system used for III through IX. It fits better for Pokemon imo, and necessitates double and triple battles. This is assuming they ever drastically alter the battle system, of course.
