As other have pointed out, him coaching in this game could provide positive PR for RU, since it's a pretty sure bet it'll be mentioned on air that Ash, the main guy responsible for turning tOSU's defense into a true force, will be taking over as RU's next HC. -And this guy is reportedly a relentless worker, so I have a sense he'll do what he needs to do to get the ball rolling at Rutgers, even with him finishing out his stint at tOSU.
Also, Narduzzi did exactly what Ash supposedly will be doing...stayed to coach in his former team's bowl game. So he'd be trying to negatively recruit against Ash by pointing out the very thing he did himself.
I think you make some fair points; I think it's going to depend on how the 'schedule' works out. Personally I think he needs to be spending the majority of his time here, with him basically doing 'consultation' at OSU during December and then going to Pasadena/ wherever during the dark period.
Joe P.