There's too much hatred towards Krstic and BBD. Why talk about trading either or both when, in Krstic, you have a 7 footer who is not even 30 years old. Maybe many people think that he doesn't do this, can't do that, won't do this, or whatever. But, he is healthy and able to play. He's got a good shooting touch, a decent rebounder, and not once have I heard him complain about playing time. In BBD, he knows the system well and that is why we find him successful in some games.
Both will continue to improve with more experience and more coaching from the Celtic's staff in the future. I know Krstic will be a FA, as is Davis. Resigning them will have to be one of the top priorities this season.
The players that the C's have right now can carry them for 2-4 more years. Whoever they draft this summer, can be stashed away to the Euro league, or if the player they get is legit and can play right away, then that's bonus for them.