We know nothing about Marcy but A openly demonstrates wishing to work with her again. I think he has contact with her. As for Kelly, I like Carie as much as Robin, and she is back to soapdom. Nothing is impossible
I think by that point it was impossible to break up Mac and Rachel again, and then after Mac died and Rachel went through a period of mourning, Espy was leaving. If he had stayed I wonder if we would have had more with Rachel and Mitch.
I think Felicia and Mitch were fine together, as he was a support for her yet not so heavy that he got in the way of her lighter moments (as Lucas did), but I think Felicia was really too much of a camp construct to ever fully work with a love interest. She was the closest soaps got to the old Crawford/Davis/Stanwyck type dames, who in their 40's tended to feel too rigidly defined to be viable with any love interest.