Nice post Hos, you obviously put a lot of time into that. And you sure know how to raise a shi...um, to give us something to talk about while we kill time waiting for the playoffs.
I agree for the most part that Jerry hasn't changed. I do think, like has been said here a lot, that he has finally found a HC who can do the things a good head coach can do - motivate, lead, create a vision for the type of team he wants and to have his young players buy into it - AND who also has the right kind of personality and ego and patience to mesh with Jerry. I get really tired of the "we've been training him" storyline he and Stephen keep spouting. But Garrett has given every evidence that he can coexist with someone who probably will always fire his mouth off and say those kinds of things.
I've always agreed with your observation that Jerry has been willing, once he hires a HC, to try and give him what he needs in personnel terms. But that isn't an absolute. JJ may always do his GM-override of his HC from time to time. But I think that with that I'll-give-you-what-you-want style, he really needs a coach with a pretty strong vision of what he actually wants. He had that with Parcells and Jimmy, not so sure about all the others. Those two "special teams drafts", of 1995 (or was it 1994, I can't remember at the moment), and 2009 occurred with two coaches who seemed to be delighted just to be the head coach. I like Wade and I'd leap at the opportunity to go fishing with him. But I'm going to guess that the 2009 offseason (and maybe the R. Williams trade that preceded it) wouldn't have played out the same way with Garrett as HC. Or Parcells or Jimmy either, for that matter.
Garrett is the pretty much the perfect coach for Jerry, especially for something that is possibly sustainable for longer than a 4-5 year run. Given Jerry's personality and ego, he probably has a pretty narrow list of coaches who'd mesh with him like Garrett has. I've been a Garrett supporter since he was hired, although I know the reality in the NFL that process and vision only matters if it finally produces success. Thank goodness for 11-4, hope we get more.
And I do give lots of credit to Garrett for the emphasis on building the OL. It was a messy process and took some time, and there was obviously some luck and serendipity in having Smith, Fred and Martin all end up Cowboys. There is some luck involved in having something like a dominant o-line or d-line come together, including having the right players come available at the right time on draft day. It's not just about spending first round picks on the line, it's also about hitting on those picks.