TMBTM:
Yoda and Obi needs a scene where they understand that what happens to Anakin is as much their fault than Palpatine's

How can it be as much their fault? Palpatine was the one who single-handedly set all the events in motion, even down to the implication that he manipulated the midichlorians to cause Anakin's immaculate conception. And he was the one who corrupted him, and encouraged him to act against the Jedi. Yes, the Jedi had become arrogant and blinded over the years, but in no way are they as responsible for Anakin's corruption and downfall to the Dark Side as Palpatine.