Good post.
He's had his issues, namely with it taking too long to assemble his staff, and with the false start he had on the defensive coordinators. He's had to learn to get better on game days, and I think it's fair to say that Linehan, at least, is a better play caller than Jason is, though Jason's not anywhere near as bad a play caller as some want to believe.
Where Jason shines is in putting together a young team with a clean cap and dedication to building through the draft and not succumbing to the temptation to reach for players in FA. He works well with Stephen and, more importantly, Jerry. He handles the difficult Dallas press well, and basically just runs the team respectably and keeps them focussed on the things that matter. Maybe we fell short in 2013, maybe, but I agree that the 8-8 seasons in 2010-2012 are nothing at all for him to be apologizing for. That was good production from a thoroughly mediocre roster that was the legacy of some really bad drafting after Parcels left.