In all fairness, while Knight did not perform as expected in 2014, I believe much of that had to do with the absence of players like Saunders, Bester and Clay. All were the difference in beating Alabama. Not even Robert Woods, who had a great clutch catch against Alabama, was available. The new crop of receivers never were much of a factor last year and Neal has yet to fulfill expectations....plus K J Young is no longer on the team.
My belief is that whoever starts will be only as good as the receiving corps will allow him to be.....and right now, given the inexperience beyond Shepard, Quick and Neal.....that's a possible problem area. And who's to say if Shepard is ready to go both physically and mentally ?