>>3835049
>X is ATB with weighted actions and pausing in during choices
You just described something that already existed before - ATB.
ATB always had weighted actions via the casting time you'd need to wait out after queueing up an action. The characters didn't just sit there mumbling or assuming a battle pose for nothing - that was the time cost you paid for using stronger spells or attacks.
The "visible" ATB only tells half of the story, and this secondary queued action ATB only started to be shown in subsequent releases of IV, as well as FFX-2 where it was more formalized.