While coaching in the NFL for this long would be beneficiary, it doesn't necessarily imply how good of a coach one is.
I'm sure you can pull up a list of coaches currently in the league with 30+ years of experience and find some that are washed up.
It's hard to tell what kind of coach Vitt is solely based off his LB's performance. If Scott Shanle misses a tackle is it Vitt's fault?
Not saying Vitt is or isn't a good coach, just playing with some logic.
I hope we pair Rob Ryan up with a fresh defensive mind out of college to coach the LB's. We need to rinse ourselves of last year's stank and keeping Vitt, a 4-3 guy, to coach the guys on the 3-4 front doesn't sound like the best idea.
Put Vitt as assistant HC/motivational speaker lol