I think they suddenly brought back Vail Bloom as Heather first to take over as Phyllis' attorney when CLB took leave for cancer treatment; and I speculate that they kept her on because of Christel Khalil eventually taking maternity leave.
Lucy has so many connections in town and I think the actress Lily Brooks O'Briant does a good job, and would be great if Griffith actually *wrote* a teen storyline but ... he probably won't.
I don't know if they'll ever address that Lucy's biomom was Daisy and her biograndmother is Sheila.
I'm fine with Heather being the stepmom who raised Lucy, and Phyllis being the annoying grandmother, LOL.