-Remove yoda from the movies, this is crucial and actually serves the OT more because you can leave in all of the lines mentioning master Yoda, setting him up as a great Jedi Master. This is also no problem to me because Yoda is boooring in the PT, save for a few good lines.
This is the only one that I am not sure about. You lose his convo with Obi-wan at the end of TPM, all the council scenes get screwed up, and you lose the meeting with Obi & Bail at the end of ROTS. Plus, then when he shows up in ESB you gotta wonder “Where was this guy in the first three movies?? When did he train Obi-wan???”
You some decent yoda scenes for sure, but the part with obi-wan is completely summed up at the end when he says to anakin “the council has granted me permission to train you, you will be a jedi, I promise” so the entire scene can be cut. As for the council scenes, almost every single one of Yoda’s lines is redundant due to mace windu or ki-adi rephrasing the exact same thing. The important parts of the Bail Organa scenes work fine without yoda, some special effects are needed but making custom mattes aboard the Tantive IV wouldn’t be too hard. My personal edit avoids the Bail Organa parts near the end so I’m not worried about that.
As for the whole “where was this guy?” point. I’ve decided that putting an empty seat in the council meeting room would be pretty cool, leaving in all mentions of him makes the audience aware of his existence, and given that Yoda serves no major purpose in episodes I-III it wouldn’t hurt the story nearly at all.
It’s hard as hell to imagine, but I’ve been editing these movies for a few years now and believe me I know them inside and out. The only Yoda material that I would miss is a couple of lines, and that’s it.