Good Post.
I've said it before, Gibbs WAS a very good coach, but a horrible personnel man. Bobby Beatherd put those teams together and Gibbs coached them. As evidenced by this year, Gibbs makes personnel decisions too much with his heart than with his head.
Also, his MAJOR downfall in this whole Gibbs 2 go-round was buying into the Snyder way of putting a football team together (I'll buy it) as opposed to the tried and true method of building through the draft.
He believed what was written about him and rode back into DC in glory, and as we see every week on the sidelines (head down, not watching FG attempts, looking panic stricken and basically not in a good place) he is OVERWHELMED by the pressure.
Your point about him not being the right man for the job is on point, because to do so, would be to admit complete, and unmitigated failure and waste of the past 3 years, and I don't even think he has it in him to see a process like that through.