I think you're underestimating the Smith-effect.
I think the "playing nice with the media" is also underestimated at least in terms of what the perception was/is of Tim Purpura. Much like Jimah Williams was painted out to be a manager lacking the knowledge to run a select team of 10 year olds by fans (perpetuated by the media and by Jimah himself), The Count suffered from his lack of media skills clearly evident by Ed Wade, a former PR man.
I heard far too often from the media about how the Astros "just don't have a plan in place to make this team better!" whilest talking about the Purpura reign as GM. Left to their own imagination, the media came up with wonderfully outlandish ideas such as "Trade Lance Berkman for five prospects and re-build". Of course it ignored who the owner of the team was, but when you don't understand the systematic plan of a GM, don't understand baseball (some media guys covering the Astros sadly do not, they suffer from the "How the Yankees put together a team" to "Well, in basketball they do this..." sort of understanding of baseball), then you're going to come up with all sorts of stuff that paints a picture of the GM and his shortcoming.
Ed Wade stated his plan (formulated of course earlier by Tal Smith with input by Cecil Cooper), then has gone out to execute it. And the most telling thing about this plan: Wade has publicized it, kept it in the media's front door, to the inclusion of some very interesting open door accounts of who they were talking to and why.
The media has the information and is now in the mode of being well-informed. So now you'll get the opinions interwoven in the reports of course (it's conveniently called blogging nowadays instead of writing a column). The days of guys like Jimah Williams telling the media "managers decision" in response to questions and the closed door type of situation that GM Purpura had going seem to be detrimental to the health of a job to do in these positions.
Ironically, Ed Wade had major run-ins with the media in Philly and that eventually led to his downfall there. Wade blasted the media for their distortions of what he felt were clearly outlined plans and execution of such. So it can work against you too if the media is inclined to be less than honorable I guess. This was during successful years building towards a winner in Philly too.