He wasn't your grandpa's (or fathers) Yoda. The CGI Yoda of the prequel trilogy was one of the dumbest changes the series made. Yoda was an iconic character, and his movement was perfect - because there was a human puppeteer behind him. Now, you couldn't do the whole Yoda vs. Count Dooku/Darth Tyranus lightsaber duel with a puppeteer, but maybe that means it shouldn't have been done at all. It could just be the wistful thinking of nostalgia, but Yoda was much, much better off as a puppet. What you wound up with in the CGI scenes was a hyperactive five year old's rendition of Yoda.