Perhaps that could be a long term solution if the Steem Dollar hits the minimum price or appears to be close to hitting the minimum. But I think it's important that some sort of safe guard be in place in case of an extremely rapid price change.

You're not going to be able to switch what is being tracked on a dime, and even if you could, there's no way to know if what ever you're automatically switching to has the same problem as he USD.