Bama's offensive output has masked some major issues on the offensive line. The fact that they've been rotating guys all year should tell you something. Despite how well Young has played, and despite his mobility, Bama is 106th in the country in sacks allowed. Only LSU and Tennessee are worse in the conference. Bama is tied for 115th in tackles for loss allowed and dead last in the SEC.
Young's output with the line he's had in front of him should further reinforce the obvious conclusion that he'll win the Heisman. And if Bama gets competent o-line play next year, the country should be very afraid.