I've heard the same things and that does concern me as well. The thing about Tyson that still intrigues me is he balled out against highly ranked opponents. So I think he does rise to the occasion...
When I did a deeper dive into Jonah Coleman, he looks like a Jordan Mason/Alex Mattison type of back. Bruiser type that will break tackles and get yards after contact. A good 1B in a committee, but I wouldn't trust him to be our 1A.