How and where did you save your households, Leto?
It sounds like great way to prevent these feral glitches.
First I saved it in the library. Because the library can be seen by any other neighbourhood. That way you can have multiple versions of the same household in different save files. But you can also use it to backup families, in case a neighbourhood get corrupted.
Please make sure that your household contains every family member of it before trying this, because it will totally lose the contact with anyone outside the household. This is the only exception where I will kill sims to get their gravestones into my household so I can bring them back to life into a new neighbourhood. That way even the family tree with the dead sims will remain the same.
This works, as I can say after testing it, but I don't see it really as a way to prevent feral glitches. More like getting around them. You will probably encounter them again after playing your new neighbourhood for a while.

Unless EA has find a way to fix it with an update of course.