My only issue so far are the new arrangements for the music. Hard to explain but they are TOO busy. They've added more instruments and at times they clash with the old ones. Whats more annoying is you can switch to the original music but you would have to know where to get the badge to do that at (Badge shop in rogue port above the normal shop. Get there from the Inn).
Edit: As for the Frame rates, honestly not a big deal. It may be 30fps but it's smooth and never dropped a frame so far (Beat chapter 2). Plus, they balanced the timing for Action commands for the frame rate, honestly the timing is easier.