I don't see any reason not to have some skepticism on Matthews. He made 23 shots all of his freshman year. He wasn't real efficient, played kind of a garbage man role. Originally I even said he might make sense as a four.
But look on the other side of the coin. He's a guy that could really use a year of skill-work and we know that Beilein's skill work programs are very intense and have been effective in the past.
As for where he fits in next year? I think it's at the three (Irvin's spot) because of how much promise the Michigan frontcourt has shown this year. Maybe you play him in small lineups, but I'm also all for giving Livers some minutes next year.
The 3 + 4 are almost identical on offense, but I think Michigan gains more out of Matthews guarding great wings than great combo forwards.
I agree with the notion that he's not going to be a great ball screen player out of the gate. I think of him more in that Manny Harris role slashing from the wing. Now Manny was a great passer, I don't expect that out of CM early on, but getting downhill and driving to the rim should be a possibility.
Probably the best news is that there will be some good floor spacing options when he plays in DJ, Moe, Duncan, Brooks, Poole.