I think there are legitimate concerns about our OC, but it's hard to judge in just one year, especially with the OL he had to work with. If we finished in the 120's, well I think we had an offensive line that probably should rank somewhere in the 120's. Lower G-5 level, I'd say, though they tried. It is what it is. Also factor in an inexperienced QB coming off academic troubles in a transition year. But it got better (UVA, NC State). There was improvement, especially on the line and at QB. It could have been worse. Imagine this year without Jordan Mason.
We'll know more next year. Help for the OL is on the way (and the ones we have will be a year older and hopefully healthier), and we now have a QB fit for this offense with a year under his belt. Next year, we should take some big strides forward. And if we have the wherewithal to do so but don't, then it will be time to go looking for a new OC.