Re: When Josh Mcd. Leaves
1) There is zero evidence that Troy Brown would want to be a coach.
2) There is zero evidence that Troy Brown would be a good coach.
3) Troy Brown had said (often) that he has no interest in being a coach.
4) If Troy wanting to start coaching, Belichick would not start him at OC. He would start as an assistant position coach, as many others have.
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CONCLUSION
If Josh goes, Troy Brown will not replace him. BTW, an OC is a very important postion on the team. I would expect the promotion to come from within, likely the TE coach.