Noteboom and Allen should be going out. I don't care how you have to do it to make them go away; do it all the same. I'd deal Havenstein as well; he's in his thirties, and he's had injury issues. Let A-Jax move to right tackle or right guard. I don't care which. I'd also let Shelton go; that false start on the goal-line and the delay of game were inexcusable mistakes, and were costly enough for us to lose.
If we go into next year without a plan at center or left tackle (or, worse still, with one or both of Allen/Noteboom there), we're even more fucked than this year.