People keep referring to him as a 5*, but he's no longer a 5*. That was a high school score based on hs production, measurables, and potential, future, production. Now there is real tape on him, and you have to see him for who he is. Call him a talented guy who has severely underperformed. The coaches have to quickly get to the root cause. There are enough other talented guys out there who have the character, work ethic, grit, and toughness who will fit into the culture that Mario has been trying to create and may also be better with respect to resource allocation.
Put another way, if you didn't know his name, saw him as Player X, and you reviewed his tape, his measurables, and his productivity in college, he wouldn't carry the same weight right now. It's possible that the coaches may still see him as a take, a kid who wasn't used correctly or had some other variable that can explain his lack of productivity. Like any player, he still has to prove himself, but he's got a longer way to go.