This Yoda work is old news. The puppet was entirely removed from TPM before they even began work on Yoda for ROTS. Lucas, with new workers doing the CGI coding this time around (some never had done anything outside of a video game), wanted them practiced and ready so that when they recieved the rushes of all the prefilmed Yoda sequences..they wouldn't just be learning on the fly.

Thus, he and the head of this department had them remove the puppet from TPM, much like the work they did on a short clip from ESB to showcase the process to George.

But it is certainly good to see photos of this.

The only way I would EVER support a CGI Yoda in ESB or ROTJ is if painstaking detail was paid to capture every movement and characterstic Oz put into the puppet.