SilverWook said:

I think the visual disconnect results from trying to make him younger. It makes little sense for someone several centuries old to look significantly different over a mere thirty years. That, and they used silicone skin versus the latex skin of the original.

Or else they applied the same goofy rationale later used to justify "fixing" the "flaws" of the original Vader helmet design for ROTS.

I think there's just as much disconnect because they put Yoda in the cosmopolitan environment of Coruscant where he is clearly not at home. The CG Yoda makes this work a bit better actually, but Yoda should never have been an active part of the Clone Wars in the first place.