Mamie’s return feels kinda thrown in, and her main raison d’etre is to be a nostalgic, 50th-anniversary thorn in the side for her longtime rival, another recurring character (Jill), with a secondary purpose as co-conspirator to Tucker. Her relationships with Devon/Nate/Lily are merely incidental. Only maybe Nate grew up knowing her. (Mamie’s relationships are with their parents, one of whom has been dead for nearly two decades and the other hasn’t been seen in over a decade.) The show should have invested time in getting Mamie thoroughly acquainted with Devon/Lily/Nate away from the business realm, but as we all know, JG sees Y&R solely through the lens of corporate drama.
They aren’t really delving into the family history in any meaningful way either. It would have been intriguing if Mamie was more apologetic about her absence in their lives or if the story really delved into the family’s intergenerational trauma (similar to how Dina’s return, the prospect of her memoir, and the specter of family secrets lit a fire under the Abbotts initially—but nope). And that’s not even touching upon what Mamie’s been up to in her years away, and the unsavory characters she might have encountered as an investor, which could be its own story.
The Winters/Barber family has been taken for granted for years. They were expecting Neil to be their Traci or Jill, a stabilizing figure they could use on a recurring basis to half-ass a sense of family, but KSJ/Neil’s death showed how underprepared Devon/Lily were to be tentpoles. They can’t just shoehorn Mamie into that position all of a sudden with no setup.