His entire history is a red flag. Not sure how you can't see that.
He committed to ND early saying he grew up a ND fan and that his grandfather was a big ND fan. He then sprinkled some of his grandfather's ashes on ND's field (no joke). Then presto, a few months later, flips to FSU. Then at the last minute decides to not show up at FSU for January enrollment and instead goes to ND. Immediate he apparently started rubbing teammates the wrong way as he was a bit of a complainer and also had a bit of entitlement issues. Has a decent frosh year and then transfers out of ND (apparently not to the dismay of some on the staff who found him to be a handful to coach) to go to USF because he wants to be with his girlfriend, who he marries, then divorces in like 4 months. Finally gets the chance to play at USF and shows little in terms of production, coachability, improvement, etc. As pointed out above, he also had issues with the USF staff at times and when he didn't get his way, pouted.
The guy has a history of indecision, inability to follow through with anything, difficulties in working within the team concept, issues with taking coaching, questionable decision making, immaturity.
That's a long laundry list of issues that he will have to overcome to become a good NFL player. Now I am not saying he can't overcome that stuff, but reality is he's a massive risk on a few fronts......... one, it's a risk he'll get his **** together off the field and upstairs in his head, two, he was pretty mediocre at USF and the only reason people are eyeing him up is because of his reputation coming out of high school, the fact he made a splash as a frosh at ND and good athleticism for his size. Someone mentioned Burfict above but at least Burfict showed himself to be a very good college player at times. Lynch never did other than a few moments at ND. So even if he gets his stuff together mentally, we aren't even sure he can actually play football at a decent level.
He's a 6th or 7th round pick at best IMO.