Yeah, I wasn't really addressing that to you. It was more inspired by someone earlier answering the "Cody vs. Rex" question by saying "which one is still around in ROTS?" I agree with you about the timing. I would most like to see Rex desert when Order 66 comes down. I just don't know where in the story the show will actually stop, and it struck me that out-of-universe they may not want such a popular character to die (same thing as Ahsoka). But as you said, they would probably prefer to have kids see him die heroically than see him kill Jedi. Those kids will still have to come to terms with that for clones like Cody, or the clones in general, when they watch ROTS... but that is addressed by Rex being molded as "different". I would say the same for Fives, but I think he will die before the show ends anyway.