Is it about being able to compete in the B1G or is it more about what his role is at Michigan? The reason I bring that up is because he's coming in with Teske. Teske and Davis don't look like they can play together. I am not sure you will see Donnal play with Davis because Donnal might be gone by the time Davis is playing big minutes.
We also need to consider Davis for much of his high school career played against opponents that were sometimes 3-4 inches shorter and giving up 30-50 pounds.
Davis won't be facing Schilling because Schilling is in his final year unless you think Davis is going to get run as a frosh. If that's the case maybe Davis has to go against Ben Carter their recent 5th year transfer.
Here are a list of bigs in the B1G
Isaac Haas Jr
Derek Pardon So-Northwestern took RS off and averaged 6ppg 4 boards in 16 mpg
Maverick Morgan Sr
Mike Finke Rs-So
Tyler Cook-Fr Iowa top 100 recruit 6'9 240
Derek Funderburke-Fr OSU top 100 recruit 6'9 210
Ethan Happ-Rs Fr, frosh of the year 6'9 235
You already said he won't go against Bryant but I am not sure I like the idea of him going against guys like Haas, Pardon, Happ etc..
I would say Peplowski played against better competition in high school compared to Davis. Matt Stegeinga, Parrish Hickman, Dwayne Stephens(ironically they all went to MSU), Derrick Coleman, Terry Mills, Anthony Buford and many more while Peplowski was playing high school ball.
Like I said it isn't as much about who he faces it's where he fits. If Beilein starts playing 2 bigs I can see but I don't see Davis playing for a few years at least until Wagner has graduated.