I have been stating what you suggested in your last paragraph for some time: we need to get rid of many of these kids who will NOT develop into B1G players. They just don't have it and I think they would do really well in mid-major leagues but not in the B1G.
I also think for the remaining of this year, because we are such a bad shooting team, but rotate so many players in and out, Pikiell should think of pressing more and changing up the defensive looks from man to man to various zones. What we do well is rebound and play hard nosed defense. Off of a press we can cause TO's and get cheap points and if they break our press, it will give them less time to set up their half court offense.
Personally, we need to cut bait with several of these players. I would like to see Pikiell bring in some more JUCO players who can shoot ala Jerome Coleman and as you stated, if we want Sa, Thiam and Omoruyi to develop, they should get even more playing time for next year.