Gib, I used to hate it when a teacher would answer a question with another question. So now, of course, I do that very thing myself. My answer to your question is to ask you, "why did a bunch of running plays get stuffed"?
We often look to execution as the be all and end all. Certainly CML did; and he won enough games to show that sometimes...maybe even most of the time...execution is the major factor. But it is far from the only reason that a play gets stuffed. Even a smaller and out-manned D can stuff a good offense's run play if they commit enough resources. Of course, that leaves them open elsewhere, but if they are certain that a run play is coming, maybe it is a good decision. I'd suggest that last season we made virtually no effort to disguise bubble screens, and very seldom would show them and then run something else. Even good execution can be defeated by being sufficiently obvious.
Tactically we did not have a great run blocking line last year. But strategically we had to run enough to prevent the DC from pulling resources from stopping the run so he could use them to stop other things. Sometimes tactics and strategy end up in conflict for a specific play or plays. Usually strategy has to win that conflict, for obvious reasons. So no, we can't stop running the ball if we have several unsuccessful attempts. Now, that is not the same thing as saying that we should run the play over and over again. If the LB's are committing to dives, run a cross buck. If straight ahead blocking is not good, run something that involves a slant or slant and pull line scheme. If their rush is penetrating on sweeps, start that and come back the other way. Mix it up. But don't stop running the ball altogether.
You can't stop running. But you have to understand why your attempts failed and change it up in some manner. And even if the issue is execution, it could be anything from poor technique to sloppy or unfocused effort to simply being overpowered by someone who is physically superior. A good OC understands why it failed and adapts. You can't afford to throw out the baby with the bath water.