Im not really sure how JB could be criticized for this offseason. DJ and Mo weren't on the NBA radar (at least nowhere near probable/possible 1st round picks) before the B1G tournament; so he had maybe 1-2 months to try to compensate for unexpected attrition that only became possible very late in the process. Then, he managed to convince the MAC MVP, who happens to play the most important position in our offense, to grad transfer here, while also keeping a spot open for Bamba. Regardless of how unlikely it was that Bamba chose Michigan, JB kept a spot open for that lottery ticket AND landed a huge grad transfer.
I can see the argument for keeping Mark, since Teske and Davis are totally unproven. But, if we lose Mo next year, then Davis and Teske would be our only options at the 5, and they'd have no experience. And I'm guessing Mark may just wanted to leave, since his ceiling here was very evident.