Questions meeting the criteria for the reversal badge are not bad of necessity. There do exist a small number of questions that are downvoted because of lack of understanding by the voter. That wouldn't lead to a score of -5 or below, except for the existence of voting rings which the moderators tolerate despite the fact that they generally involve abuse of the rules1. Of course, there is a very strong correlation between -5 and questions that truly suck.
I've come across a few cases myself where the "common knowledge" is incorrect. Most often that results in swarms of upvotes on incorrect answers, but I'm sure that sometimes it affects questions.
If we could find a way to make the Reversal badge only apply to giving great answers to questions which were misunderstood, it would make it exceptionally difficult to earn, which is not a problem -- it is after all a gold badge, and also stop people using it as an excuse to feed vampires.
The linked question bemoans the fact that the deletion of a question where a Reversal badge was earned makes it more difficult for them to earn a second. I disagree that this is in any way a problem. If a negatively scored question gets deleted even with a highly voted answer clarifying the situation, then it isn't misunderstood, it's bad. Let's celebrate the way deletion gives demerits against future Reversal badges, by making it an explicit feature.
For example, the Reversal could require that the question stay open and undeleted for another 30 days, and there could be a 10k+ tool for viewing candidates. It would be a good place for people hunting for "Refiner" badges, because this list would collect the on-topic but misunderstood questions.
How about this: Reversal is changed to require that the question have -5 score when the answer is posted, the answer gets +20, and the question later (possibly with edits) reaches +5 score. These criteria should prevent it from ever being awarded for answering true garbage.