There's been nothing that I've seen regarding a or b. As for c, I think for once GH actually went too subtle.
Ryan, all enamored with Felicia, approached her at The Floating Rib in completely smitten mode. But by the end of the conversation (and Lindstrom did a great job with the transition using only facial expressions) Ryan had fallen out of love / obsession. Felicia spoke of herself as a grandmother, talked about how much she loved her life of family and domestic bliss. The more she talked about how happy she was and that her adventure seeking days were behind her, the more Ryan's face began to harden. Felicia was now nothing but a disappointment, a fallen idol.
Story wise, I think if he hadn't already met Ava and been drawn to her, we might have had a Felicia as a murder victim. BTS, perhaps HE's exit changed the direction. At the time, I did think they were using that scene to set that in motion and then the story changed course. And I'm hoping the course stays changed. Even though we hardly see her, I would be sad if they killed off Felicia. Sentimental reasons, I guess.