The yoda stuff was more a compensation I had in mind for spoiling the great ESB reveal. I already enjoy the saga as it is now, don't mind the surprise being lost, I find it more a deep saga now; however since some people don't think the same there was this well, you know who Vader is, but here we invent another hole in the saga kinda to replace the old one.
Considering we're speaking hipothetically, Bail could rather be a stand-alone character; actually having Bail return to Coruscant could work only as a way to show the tantive (I'm saying, why would you have him leave and then come back, just make it appear arriving, he's never left since this is the first time he arrives).
Even if you want to keep showing the history of Yoda, you could keep the Tantive's cockpit scenes and in any way, still you could make room for the idea of Obi Wan going to Mustafar because he's worried about Anakin... the only thing you'd loose would be Yoda and Obi going back to the Jedi place, and watching Anakin's massacre, makin Obi wan go straight to Padme's and erasing some references to the "secret to obi" relationship between them throughout the movie.
Infact I had the idea of havin a suited Vader do the slaughter, that's why getting rid of the scene of Yoda and Obi finding out it has been Anakin who killed the younglingst wasn't a problem in my mind and I didn't even consider it since for me it had to be cut, though I see now you're not aiming at that goal (havin the actual Darth Vader go kill the Jedi near the end of the movie). There's a guy who made a great mock up, I think that if you want to, you could polish it with a better roto and make it work, though considering I don't master AE, perhaps I'm not being grounded about the amount of work rotoscoping means; In that case, I offer you an apology.
Anyway bob, you've got my full support with this edit, I know you're doing great things there and I fully respect your calls since you're making your best to get a better movie out of ROTS