Butler (and, people forget, both getting shipped out West because the East regional was in the Dome and then also getting the short turnaround between the subregional and SLC) was a horrible draw, no doubt.
But even without Onuaku that was a wide-open path to the final game. Kansas State and Xavier went to double-OT in the other game. After that, Michigan State was in the same situation SU was, Kalin Lucas had torn his Achilles or something like that and was out; SU was a lot stronger than they were. And Duke was weak that year.
All SU needed to do was a) not spot Butler an 11-0 lead or b) not slow the tempo when we were opening it up late. That's the kind of game that sticks with a fan for a long time...