The issue with Martz isn't that the game has passed him by.
It's that his scheme exposes QBs to damage. Sometimes QBs need to hold the ball to deliver a pass and he encourages that.
Well... QBs can be tough and all, but after Warner, Bulger, Kitna and others, while they all performed very well, they all took tons of damage and rather than have 10 year careers, they all only performed very well for at most 3-4 years before severely deteriorating due to physical damage.
College doesn't supply enough franchise QBs to expose them to that kind of damage which is why you just won't see Martz allowed near more NFL QBs.
Essentially, he breaks his toys... and when that toy is an NFL Franchise QB... that's like crashing a rare, vintage car... after breaking a land speed record with it. The record is nice, but it won't take long before owners won't trust you with their cars anymore.
And while us fans want to see records...especially when our current jalopy can't hardly get out of 1st gear... owners just aren't going to trust Mike with the keys.
Being terrible at the job isn't the cardinal sin for OCs or HCs in the NFL. Damaging or allowing to be damaged your QB? That's the cardinal sin. And he violated it multiple times at multiple stops.
/shrug. It is what it is.