Deion and Marshall both played 30 minutes. Deion had one more rebound, one more assist, one more block, and two more steals. (On the negative side, Deion had one turnover, while Marshall had none.) But the biggest thing is Marshall missed five of his six shots. Deion didn't miss any shots, as he only took one and made it.
The object of the game is to make shots. A guy shooting 17% for the night isn't really contributing to that goal.
If Deion had all of Marshall's minutes, basically all Marshall's six shots would have gone to other players, who I bet would have gotten more than a total of five points out of them.
I think Marshall and Deion are both fulfilling their roles, and I do think Marshall should be starting over Deion. The only point I'm trying to make is that people are overestimating the impact difference between these two.
When Marshall is scoring well, he's partly (not entirely) replacing points that would have been scored by others. When he's not shooting well, he's hurting us. Deion has figured out how to not hurt us with missed shots...leave the shooting to the guys who can do it.
In my opinion, Marshall won the Fordham game for us, no doubt. But I also think if Deion had taken Marshall's minutes in the VCU game, we would have won that game. (It's too harsh to say he lost the VCU game for us, as there were any number of events that could be blamed for it in such a close game that went to OT. But missing five of six shots in regulation turned out to really hurt.)