It isn't a staff issue and I am betting there are no changes to staff. Further basketball staff changes really won't do anything.
Prohm will be here another two years so really just have to hope that there is some kind of crazy turn around. They need guys to make giant improvements and for new players to be upgrades.
The staff seems unable to teach defense, rebounding, and interior skills to the players, or just doesn't understand that these things are problems beyond giving lip service to them in press conferences. However, I won't be surprised if there are no staff changes, because these problems have been apparent for a couple of years now, and nothing has been done.