CC - Coordinator Confusion

So yea - another post related to the most talked about subject on the boards.

Over the last five years, we've never had a decent defense (or defensive coordinator) who has lasted more than a couple of seasons (I don't think Greg the White will buck the trend). As discussed in some threads already - one of the secrets to succeed in B1G 10 (with 12 teams) is a potent defense - one which stifles opponents and flattens QBs and RBs, forces turnovers and makes things happen. They can build momentum from the back and change games and demoralize the opposition.

Is it time to bring in a head coach who is more defensively oriented and hire an assistant offensive coordinator? Yes I know that defensive coaches are not as glamourous and don't attract as much limelight - but as the cliche goes that defenses win championships and offenses win television ratings (its probably true too)

Also what are the advantages/ disadvantages of having a defensive HC vis-a-vis and offensive HC? Does it affect recruiting ?

In the same vein - are any prospective defensive coordinators available who can come in as HC at Michigan?

I am not very familiar with the coaches around the nation in general but just thought I'll put my thoughts to paper (or blog).