If we had a DL that could stand up to a run, I'd agree with you Andy. but we don't.
We should have kept Kelly (or brought in a second GOOD DT, or 3-4 DE) and brought in at least one (two if they knew they were dumping Mankins) veteran OL. We could have afforded it easily without being in "go for it now mode." And this isn't hindsight, since I and a lot of others were saying this back in February.
If the Pats don't fix their lines - either through scheme or personnel - I just can't see how they get near the Superbowl this year. I know it's early, but giving up 200 rushing yards to the Dolphins and giving a guy like Tannehill (behind a patchwork OL) all day to throw isn't promising, and certainly the OL wasn't promising, either.