I had this idea in mind, which I think that could tie a little bit some things. Of course, it wouldn't preserve the WTF moment of ESB. But still, I find it (and hope you too) very interesting. Of corse I don't pretend that just by putting in excercise this only idea all the problems of the PT would be solved, but let's see.
"He was a pupil of mine until he turned to evil" - "Annie was a good friend"
Well, immaginin' an all-PT-episodes fanedit saga, make it as if Obi Wan was not that impollute Jedi we see in the theatrical release, but someone more in line with the great guy, but yet tricky person we see in the OT. Something ala Qui Gonn. Someone who we know has great intentions however's a little rogue; a Master who could tolerate Anakin being married. Till here's the general EPI-EPII editing.
Let's sink into ROTS. By this point ObiWan should know about Anakin and Padme, so sharing the secret is an implicit way of showing how bonded they are as best friends. On the other hand they are like the best generals from the Order, perhaps except Yoda. So Skywalker-Kenobi are kinda the star boys who have a very particular pov of the Jedi rules.
By the time we reach order sixty six,we just get rid of Yoda, I mean, we see he chop's the clone commander head's off and that's it (so that we make room for this brand new WTF moment in ESB replacing the other one. This could make a good cliffhanger.. "what? Yoda? still alive?") And have Obi leave Utapau in hurry. Bob managed to get rid of Bail's hologram. having just the radio signal gives us the chance to replace the message and leave it into another place:
C:"this is bail organa's ship" (bail is a senator, he doesn't have time to be communicating with lost Jedi through the galaxy, so have obiwan speak with his captain instead feels more logical to me)..."it seems that there's been a Jedi rebellion. The jedi are being hunted"
OBI WAN: ANAKIN!! (worried). so he goes straight to Coruscant and Padme's, worried by his friend being in danger. By the time he reaches Mustafar and sees what Anakin does to his pregnant wife, we have enough critical mass so as to have them fight.
Pretty doable, I think, compared with other stuff Bob already achieved. The main disadvantage I find on doing it this way is that we just don't have the Obiwan-Yoda chat about Qui gonn.
On another field... ROTS not being oversaturated? Have you taken a look at Felucia, Utapau, Mustafar even? I agree that this episode has more studio-scenes, which is excelent, for we're getting closer to what ANH is (it gets even claustrophobic at time). The more I re-watch it, the more I realize that TPM is, at some points of the movie, the more balanced point of PT technology and OT influence. It feels starwarsy, like some kind of an enhanced, almost 21st century OT.