not any OL coach or specific OL personnel...how many times have we seen talented OL members appear to be poor run blockers while in South Bend, but then they go to the NFL and perform just fine against bigger, faster, stronger....better NFL defenses. Kelly's default offensive philosophy is flawed and that makes any OC or OL coach under him a moot point.
Commitment to the running game is how you establish a solid rushing attack and develop capable run blocking OL. The only time Kelly consistently shows a commitment to the running game is when he is working with a QB he doesn't fully trust yet, and in those years we normally have pretty good rushing attack and more consistent overall offensive performance (weird right). But, as soon as he developed trust in his QB, he delegates the run game to an afterthought and the offense suffers...sure it looks pretty when clicking with all the big passing, but as soon as we face and opponent with good pass defense or face poor weather, our offense goes completely idle.
Kelly's lack of understanding regarding how much a steady run threat actually helps a QB be more effective in passing, or how stupid it is to expect your QB to throw the ball 30+ times effectively in monsoon conditions isn't really surprising considering offense wasn't his specialty...the offensive genius tab is a myth. The guy was a LB in HS and College, started his coaching career as LB coach, then DBs, then became a DC, then a HC...he cut his teeth on defense as a player and coach and didn't play or coach anything on offense until after he became a HC. He never served as an OC under another HC to be developed/molded there, he never had to try and find open receivers vs 8 man coverage against a D who knew you weren't going to run, and he never had to throw (or catch) a slick football in a game taking place in a monsoon. He doesn't have a great offensive base or a sound offensive philosophy, he just knows he likes passing the ball regardless of anything else and is perfectly willing to force feed the passing attack even when it's completely ineffective, but will typically abandon the run game at the slightest hint of adversity (and sometimes even when it's having success).
This is the cloud that OCs and OL coaches have to operate under as long as BK is the HC.