CG Yoda lacks any expression in TPM.
Did you mean the puppet? I’m confused.
The TPM puppet literally has only one possible facial expression. The way they constructed the puppet made it impossible to do any thing other than basic lip flap. It has the same face in every scene. The ears and the eyes have some movement, and that kinda/sorta makes up for the lack of expression on the puppet, but it’s never utilized very well.
Again, if I was just working off memory, I could be convinced that I’m misremebering how stiff and ugly the puppet was, and how that stiffness inhibited what performance the puppet could give. But that video is right there! And the CG looks more like Yoda, acts more like Yoda, and is a better replacement in basically every way.
ALL THAT SAID: I’d love to finally get my hands on a theatrical restoration of TPM, and any reconstruction claiming to be “theatrical” needs to have that ugly, stiff mistake of a puppet in there in all its pop-eyed, ack-ack glory.