Oh no you don't. Mace Windu chopping Boba Fett's head off was verrrry satisfying, one of the best parts of the prequels. =)
And anyway, and in that case, why not just have Boba Fett travel back in time and kill Annakin's father before he can conceive and unleash upon the universe that whiny, bitchy brat who will consequently never turn evil etc etc etc?
Heh. No, I was referencing Abram's Star Trek. Bad guy witnesses his home planet blow up, blames Spock, travels back in time just to force Spock to watch him blow up Spock's home planet. Same thing, except decapitation of dad.
Heck, if they wanted to please fans, they'd find a way to kill Jar Jar.
Also, sorry, but I gotta pull your Star Wars Nerd card. You must be a Trekker.
Annakin didn't have a father. He's like a really F'd up Jesus, except instead of a Holy Spirit, he had midichlorians.
EDIT: Oh, and funny side-story. I saw Episode II in a packed theater, 4AM showing, not-quite-but-almost opening night. I don't think there was a single sober person in the audience. I was dressed as Boba Fett (a really crappy costume, made out of cardboard and duct-tape). When Windu decapitated Jango, the entire theater erupted in cheer. Except for me. I loudly screamed, "NOOOOOOO!!!", which of course elicited a bunch of laughter from the seats around me. I wasn't faking it. That scene was a knife in my heart.
Go to hell, Mace Windu! I'm glad Annakin threw you out of the window!