Helmet scouting is certainly risky, but IMO there is a greater "buyer beware" factor for QBs coming out of schools like Alabama, Clemson and Ohio State. Those schools are so loaded with talent, and so far superior to most of their opponents, that it can be especially hard to determine whether their success was the result of their own abilities or more a reflection of the talent and the system around them. For what it's worth, I think Mack Jones is going to be a good NFL QB, and that Tua is a prime example of a QB with average ability who was made to look like a superstar by the talent around them...