Well, I certainly hope it isn't Martha. Her and the daughter are a major part of that ensemble, as well. I love her character! Also, she's an aging actress...it's wonderful to see her in a series....playing a vibrant, vivacious older woman. We need more characters like her on tv.
Esposito is still dating Laney. And I can't see her leaving, either. Honestly, I can't see any of them leaving. This cast (the WHOLE cast) works great together. It just all fits....perfect pieces in the puzzle. I'm not sure I'd be willing to off anyone. When you have a formula that works this well...it might be best not to change it.