Disagree. They'd all need to be replaced, they're on the roster for some reason, even if it's only depth and practice bodies.
I counted more than half that I think would clearly be worth re-signing. Actually, I'd argue all of them should be re-signed unless a better value comes along, either a better player at the same price or a comparable talent at a cheaper price.
I think several still have a lot of upside. Hicks is one that could very well turn out to be a real steal. I think he's showed enough that I'd love to see him get a contract extension in time for Christmas. Tyms is another that I'd like to see have a good chance when he's healthy, to evaluate how much of an improvement he would be over Dobson. As much time and chance that Dobson's had, I'd expect Tyms should be around for awhile longer to see how he can do. And the only reasons that I could see to let Blount go would be if he got too high an opinion of his own value, or if he loses focus on doing his job and starts to enjoy his success too much. Fletcher and Martin are two others I think are definitely worth keeping for what they've already showed, and their potential for even more growth.