What else have I missed, I wonder.
As for the change:
The pupput looks more real and tangible, as it is there and part of the shot. The digital does have a painted look to it, which gives away the effect. The digital though does look more like Yoda, especially prequel Yoda.
So really, it's between realism vs cartoonish but more like the character. It's a touch call on one pic. I never really had a problem with Episode I Yoda. Not like it matters. I've bought the film twice on two formats. I'm not buying it again.