I wish they had done this

I hate that Valerie Harper got fired and while I have never had anything against Sandy Duncan, wouldn't it have been cool to do a Newhart or something. Say at the end of the 3rd season Michael is in bed and wakes up, turns on the light and there's Valerie. He says something about having a strange dream. I know that might not have been fair to Sandy Duncan, but she could play a new friend for Valerie in the fourth season. Barbara and Annie weren't around so that is how they could keep from letting her go. Or at the end of the third season Michael could walk into the kitchen and Valerie is there. He tells her he had a strange dream and then Sandy knocks on the door and they introduce her to the audience as a neighbor. This is all predicated on if Harper and Lorimar had somehow resolved things and decided to bring her back.