Oh ok. Yeah a part of me wants to try an edit where Maul/Grievous/Obi-Wan's previous failed apprentice are all the same person.
Of course another failed apprentice makes Kenobi look like a further dunce but to me it works better than the "different points of view" thing in RotJ.
Wait a minute. Where in the saga does Kenobi first mention that he trained Anakin as a jedi?