Extracting a sim involves going into SimPE and getting copies of their apperances, remaking them, then setting their family ties. This is a huge undertaking. I wouldn't do it unless you were completely enamored with this fambly. Speaking of, moving sims between neighborhoods in game will screw up your neighborhood so this involves more SimPE work. From the looks of it, you can't save them.
Do you think I could sort of temporarily patch up my neighborhood by extracting copies of the affected sims, and then replacing the glitched ones with clones that have the same relationships and memories?