Dak was at his most successful under Linehan who was nothing like you describe. Moore is gone but so is Nussmeier, the QB coach.
Coryell becomes a battle between the OC who is timing their routes at certain depths for in, outs, and curls while the DC is having his DBs drop back to certain depths to try and counter it.
Linehan was pretty damn good at it. He was constantly getting guys like Dez, TWill, and Beasley into wide open spaces. Compare that with 4 curls being half of those calls despite the DC having the DBs sit on them.
The real problem with Moore I think was that he was too predictable. Sure he used a lot of formations but we did not use a whole bunch of plays. Given that, teams could focus on a few plays per formation. Watching Warner jump all our run calls and then talk about how we were an open book cements that in my mind.
As for MM, i think you have him pegged all wrong. First, he broke into the league as the QB coach then OC for Marty Schottenheimer. When he was with the Saints he used backs like Deuce McCallister. With the Packers he utilized Green, Grant, and Lacy extensively. His passing game was typical WCO with shorter passes designed to get players the ball on the move to facilitate RAC.
Schottenheimers gig in Seattle was to run all of the play out of any formation. I do not think that is a coincidence.