Cool tweaked palps! I think ideally if we were to see Palpatine from the OT perhaps with some enhanced eyes and Palpatine from ROTS somehow thinned out a bit and some of his more corny moments excised he'd match up a bit better.
Visually Palps looks really close to his OT counterpart in TPM and AOTC, so at least they got that right. It seemed like by the time ROTS came around they got a little too creative with the makeup and Ian had gained a few pounds.