1. Just because a kid has an offer, doesn't mean he is a take. Lots of players, every year, get offers from schools all over the country and end up either going the Juco route or end up greyshirting bc of their academics. So just because he has offers from these schools, doesn't mean he is a take. Hell, he is a 'commit' to us and he isn't even a take yet.
2. When we used to take the "Prop 48" guys, they used to redshirt to get used to the academic side of things. MacKenzie is not the type of kid who will do well sitting out of football for an entire year, away from home, in a school that is REALLY challenging academically. His tweets this week about not starting are an indication of this, but not the first signs of it. The staff is aware of this. He's a stud, and he's going to want to play right away. Like Davonte Neal, they'll have to keep him engaged.
3. I get the whole "Just take him, he really wants to be Irish!" side of things. Absolutely. However, I'm not sure everyone realizes just what an incredible jump high school to Notre Dame is for these athletes. It's not just scores with him, it's grades as well. Reportedly, he has messed up a lot with his grades, which is why he is in the situation he is in. If he's having a difficult time getting a passing score for his ACT/SAT, and he can't even get passing grades in high school, what's going to happen when he gets to Notre Dame, and he is trying to juggle REAL courses which require real studying with professors that won't give him a break while putting in all the time it takes to be a football star. That will be incredibly difficult.
Guys like Golson (who has a much better academic record) and Grant felt it was so difficult that they had to cheat, multiple times, putting their careers in jeopardy. The academic side of things is no joke.
I'm not saying they shouldn't take him. I'm just saying it's not as cut and dry and some people think. He's got a major battle just to get accepted to ND (he's got a bit of a battle just to get qualified to play anywhere), and he's got to do it before Nelson or Quick decide (if one were to choose ND that would be it for Mac; Quick is becoming a longshot, but Nelson might not have that many great options at this point). I like the kid and I hope he can get it together, but gun to my head, I'd say that the chances of him being Irish in August are about 5-10%.
EDIT: as for Tee, according to someone who would know on ISD, Tee never took classes at ND. He arrived, they realized he wasn't qualified, so he wasn't allowed to take classes and was in limbo for a few weeks while they figured out what the hell went wrong. That was a giant clusterf***.