I certainly hope that Gary Barta is smarter than just to tell Brian not to repeat his bad behavior. If Barta is smart, and actually in control of the program, he would explore the reasons for Brian's frustration, which means he would not shy away from asking if the working relationship he has with the Head Coach is part of his frustration. If Barta is not willing to go there, he is not doing the job he was hired to do.
Look, I'm not asking that Barta get between Coach Ferentz and his son Brian, BUT I am saying that he needs to determine if there is an issue between the HC and the OC. Just because BF is the HC's son should not preclude him from stepping into that area because Barta's responsibility is to address potential issues within the program, not to sidestep the issue.
I don't envy Barta's dilemma, but we must remember that he approved of the OC appointment and now he must deal with it - not as a family matter but as an Big Ten AD/HC/OC matter. I hope it can be done professionally, and if there is some frustration between the HC and OC, that it be brought out into the open so that it can be dealt with effectively.