One other thought I've had (but which slipped my mind when I was writing up the post) of how these episodes might affect reactions to Revenge of the Sith is that Krell boasting about how he's going to switch sides makes the clones killing him something "for the Republic" and not just "for their own safety." If conflating "turning on the Republic" and "turning to the Dark Side" somehow managed to carry over into Order 66, there would seem to be something like irony there...