No on Azuibukie. Bookout and Deangelo didn't want to play with him. That is why OU didn't push harder to land him. I'm guessing Bookout would have went to OSU had Azuibukie came to OU. Not a trade I'm willing to make.
Alexander cheated in school, and was going to be ineligible the entire next season, if I remember right. That is why he transfered, not b/c of Kelvin.
As for Hump, he himself has since said that it was a mistake to leave. He was unhappy playing PF at OU (wanted to play SF, saw himself as Scottie Pippen). Funny thing is, he played a lot of center at ND. Not sure what Kelvin could have done here. Hump wasn't a SF, and I don't blame Kelvin for not giving him minutes there.