As much as I loathe Garrett, I don't think Kitna or the team would have turned in similar numbers had Wade remained the head coach. His firing put a lot of players on notice, which led to better effort all around.
Trading Romo? Letting him walk after 2013? Not Jerry's style. He's hitched his wagon to Tony's star. His idea of a quick fix is changing coaches, not QBs.
Most fans would rather watch a "competitive" 8-8 or 9-7 team than do the right thing and totally bottom out. Problem is, Jimmy's not around to conduct the rebuilding process.
Harris showed a lot of promise in the #3 role last year. Signing Robinson might delay his progress. Of course, you could also sign Robinson to start and put Austin in the slot.