It's also interesting that the way I chose to solve my scenic dilemma was to, more or less, ignore it. I didn't go back and delete any passages; I didn't start erasing dialogue wholesale. I just kept on going from where I'd left off a week or so before.
So far it seems to be working -- I haven't gotten stuck again yet, or realized what a foolish mistake I'd made by not repairing anything first. And I've always believed that writing something -- even something you might have to fix later -- is better than writing nothing. So in that way, at least, I'm doing it correctly now.