Unfortunately, Norvell isn't the problem just like Watson wasn't the problem. I knew a switch to a new OC in the long term wouldn't fix much. I think Heard gave us a jolt of optimism because he was a bad match up for Cal (I will say I still have optimism in Heard).
At the end of the day when you have to start guys like Doyle, Hutchins, and Flowers on the OL you aren't going to do much of anything. The only way you go about fixing this problem is to upgrade the talent in recruiting. Like Watson, it's difficult for me to even judge Norvell because the offensive line can't block.
That's why I've continuously said it's premature to fire any coordinators. I have no clue if Bedford, Norvell, or Watson end up as great coordinators but trying to judge them with the talent we have is impossible.