I suspect you are right. TD will be gone if the season plays out as you have described. Mularkey may be gone as well. I suspect it would be just as good to let McGahee and Losman play and perhaps sit Moulds to see what we have with the younger receivers. I can't imagine we will keep many of the players who can get out, and would hope we could get some good draft choices to start rebuilding and pick up some better players in free agency.
ALTERNATIVELY, we could RUN the ball, cut down on the dumb penalties, play to Bledsoe's few remaining strengths, and compensate for a line that simply cannot pass block, and finish the season 8-8. We lose a number of players to free agency, cut Bledsoe, trade Moulds and Henry for what we can get for them and rebuild.