I think she had already given her notice basically and I think she was tired. She was playing like 45 characters and Kristen really had no where to go once Jarlena reunited.
I honestly don't think Dee changed the way she played Marlena until the mid 90's. But I think something was just lost along the way with them chemistry wise. Isabella and Roman would never have fit into Reilly's Days unless they made Isabella a psycho which I could see. I think it's possible for Roman/Isabella to stay on the canvas past the affair and hook up or something as revenge, but they weren't going to be major players in JER's vision. He clearly had tunnel vision on Jarlena and while I could see Isabella as the psycho spoiler, Kristen just works so much better and ED is obviously the much more versatile actress.
You really have to appreciate Stefano's dedication to stalking. And also John's dedication to giving Marlena ugly ass jewelry.
From William Lipton (Cam - GH), to Jacob Young (JR - AMC) and Kim Zimmer (Reva - GL) an actor shouldn't need to shave their head to get the audience's sympathy for a cancer storyline when adequate acting would suffice.
Yeah I didn't like what they did to Vivian. She became a caricature and a joke. Also once Carrie and Mike became a thing the whole Carrie/Austin story had been going on so long without them having much time together that I simply lost interest in them ever getting back together. Even now I could care less if they are a couple or not.