I've seen Max play a few times, he has good size, consistent release, not overly quick/agile, but doesn't require much daylight to get his shot off. I liked him when I saw him play. I don't think he's a "Big East" player so to speak but do think in the right situation he can be successful in the Big East.
You don't have 5 studs out on the court all the time. Role players/ specialists whatever you want to call them can thrive if they are accepting to do their job. Max wants to get minutes and if he came to St. John's he'd be expected to crack the rotation otherwise he would have stayed at Harvard.
I think he's a good teammate and will work hard in practice. For me that means something too.