I think the fact that the show came back as great as it did (IMO) is partly a testament to his and other longtimers' endless skill, talent and longevity. He was still there and towering at the end on ABC, and despite the fact that his appearances were rare online and they were clearly working with restrictions, his presence and Adam's family and legacy still powered the show. They knew all they had to do was show Adam standing tall at a gala and they had a big moment. His lover longed for him, his children struggled to prove themselves to him and make themselves worthy of his empire right to the end. IIRC, much of their unintended final episode was still all about the towering force of Adam in that family and that world.
They're not going to hire anyone other than 50c & Change Frank unless ABC somehow has an epiphany and decides to reinvest in daytime drama on broadcast, which I find infinitely unlikely.
The show's only shot is for the creative personnel to develop any kind of vision of their own beyond the network notes and Frank's personal pride or pets. He's the only reason most of the show's biggest problems are still there.