Why are we talking about changing the OT storyline? It's the PT that's screwed up.
And regarding Boba Fett, I don't see what the big deal is with him dying in the sarlacc. In ESB, he didn't really do anything more than follow the Falcon for a bit, tell Vader where it was going, and sell Solo's frozen body to Jabba the Hutt. None of this makes him in any way badass. If anything, OOT Greedo is more badass than Boba Fett because at least Greedo got the drop on Han (however briefly).