Doug Nussmeier is Offensive Coordinator , Saints officially finalized hire per Underhill

No in terms of player and coach. But coach and coach we have. Sometimes it's worked out great, others not so much. And one scenario it was a disaster (that was in college at Iowa with HC being father and OC being son).

We have seen coach and player son in college though. KU basketball's coach Bill Self had his son on the team for a couple of years. No problems.
Can't compare it. QB is something different. That may work with a LB, maybe with a DE or a WR. I don't think this will work with a QB. There's only one and I don't see a scenario where a father says to his boy "sorry son, you don't have it". Next thanksgiving would be something special...