Dixon seems like a bit of an enigma to me. He has gotten very little press. I've never seen him play. The four games he has played in for the Steelers, his numbers were not bad. But, if you look at the path his career has taken, one might wonder if he might not be a decent QB who just never got his chance? So far, he has been signed with the Steelers for four seasons, the Ravens for one (both teams that are completely settled at QB), and last season, he was briefly with Philly in the preseason, who went with Vick, Foles, and Barkley.
Of course, at 29, he's hardly "project" material. But, unlike others on these boards, I have not been at all impressed with Tuel.