I watched McAndrew play a handful of times this past season. Nothing at all screamed high major D1 level player to me. (insert joke about Nebraska being a high major D1 team)
He's tall and skinny (listed 6'8" 190 lbs), but he is just a shooter and sits outside the arc waiting for kick out 3s. He's a liability on defense as he's too skinny/weak to guard bigs and too slow to man up guards. He needs to add a lot of muscle while making he feet quicker.
I get he was only a sophomore and has a lot of development left. Maybe he's showing some things on the summer AAU circuit that weren't evident in his HS season, but I don't get this offer at all.