FFX-2's system wasn't entirely new. It was just the ATB with a mid-battle job change mechanic. It really was the evolution of the PSX and SNES games. If anything, FFX's system was the new one. But even that borrowed from FF Tactics in the way turns are set up.

I do appreciate the consistency and drive to make small improvements in the battle system. After 11 games, DQ's turn based battles are still fun. But I think FF was always intended to be a series for experimentation. The games have several different directors and creative staff and show off a different vision in each one. I appreciate variety, so it is nice to have series like DQ and Persona that keep it consistent while also having the FF series change it up.