Completely agree re: combat system. Last one I enjoyed was Xillia though I think the best one so far has been Vesperia. As you said it was never complicated but at later levels it felt like playing a fighting game. Sure you could spam certain moves over and over but you could also do varied and expert combos which would reward you more money, xp, etc.
Zestiria is where it really turned sour for me. Some how Zestiria and Beseria have managed to both convolute and oversimplify combat. It's convoluted in terms of how the mechanics are explained but at the end of the day just mashing buttons seems to work.
This will be a Steam sale pickup for me sadly.