I haven't played a Tales Game since Vesperia. Have the visuals gotten worse, or am I mistaken? I should really get around to playing my sealed copies of Xilia & Xilia 2.
The artstyles have taken a dive, but generally speaking the entire design of the games has changed in general.
No more overworlds, combat is now done in the third person and some games in combat are not 60fps, like Zestiria. In exchange for dropping cell shaded type graphics, they've gone for much higher polygon count models, far more detailed facial animations and expressions, and actually being able to explore in the third dimension instead of fixed cameras.
They have been somewhat divisive changes, but i enjoyed Xillia and Xillia 2 for what its worth. Only with Zestiria have I felt the design of the game has become problematic