Oddly, I have to say that this is the best post I have read for making the case that Tyrod could start.
It's easy to forget that EJ had three knee injuries in his first season, but, it's not helpful. A lot of hay has been made regarding the notion of Marrone "holding EJ back," regarding the read option, and his ability to extend plays, and run the ball. But, seriously-- three knee injuries, both knees, in his rookie year! People on this board love to accuse others of refusing to acknowledge EJ's numbers, and how "his stats are better in his first 14 games than many of the greats," (to quote Alphadawg7), yet they act as if those three knee injuries never happened.
They did!
If accuracy issues are able to be overcome (many on this site have posited that they are not), then Tyrod, and EJ are on equal footing. Neither have shown themselves to be accurate to date. But, in terms of the read option, and the ability to run? Advantage: Taylor.
Also, let's not forget: Rex has spoken very highly of Tyrod. Of EJ? Not so much.
All that being said, Cassel is still the odds-on favorite to start.