Wasn't Philbin the Offensive Coordinator when Rodgers won the Superbowl? I thought the reason Ross hired him was to bring Green Bay's "offensive system" to Miami. This whole Sherman saga shows me that Philbin was nothing more than the a line coach in Green Bay with an OC title. Mike McCarthy creates the strategy and Aaron Rodgers executes it.
Position coaches almost always fail as Head Coaches:
Herm Edwards, Rob Marinelli, Mike Tice, Tony Sparano, Jim Caldwell, Mike Singletary, Jim Zorn, etc...
Then there are de facto OCs
Brad Childress (Andy Reid called the plays), Gary Kubiak (Mike Shannahan called the plays), Marty Mornhinweig (Mike Holmgren called the plays), Josh McDaniels (BB), Eric Mangini (BB), Romeo Crennell (BB).
The exception to this rule is John Harbaugh, but the Ravens are an outstanding organization.
Doug Marrone is very similar to Philbin (was "OC" under Sean Payton), but at least he got some valuable HC experience that will help him adjust.