I think he would be totally welcomed back, but it sounds like his agent already got him his money, and it won't really be an open recruitment.
Yeah, this is one of those that only feels weird given how recent this all is. He's a rotational piece, and a captain. But he's a backup on a very good P5 team. He could probably start at 75% of P5 programs. And hell, given how crazy it is now, I could see him starting at a very good school. If MSU didn't have Fears, Holloman would be a perfectly acceptable starting PG. But he's not REALLY a PG, and there are increasing rumors that Richardson is coming back for his sophomore year, so he likely won't be starting next year either.
I don't know what MSU's total NIL commitment is, rumors are it's top 12ish. But keeping around good 4 year reserves is a luxury almost no school can afford next year. because it's not just him. If you match what do guys like Carson Cooper do? Is it a locker room issue? Does he then leave to get an equivalent offer? I don't feel sorry for coaches, they are well compensated. But I don't blame the ones who don't want to do it anymore either.