If there's one thing that's stumped Saban it's a mobile quarterback and a hurry up offense. If I were Clemson I'd make a serious note of that, Watson is very elusive and accurate.
Clemson's D-line is also huge and athletic, Bama's O-line will not have the size advantage they typically have against other teams. Clemson has a serious chance, and expect Nick Saban to petition the NCAA for a "no Deshaun Watson rule" if he loses.