I've assumed so, as I don't believe she did any acting post-AMC, and I think it was spun as her wanting to leave, but I'm not completely sure. I doubt McTavish would have written her out, as she created the character and gave her a lovely exit.
I thought she and Dimitri worked much better than they should have (not a big fan of the Tad pairing - or Tad in general...), but probably not a hit with viewers. I think the Adam and Alec pairings worked in terms of high drama, but not romance. It was very plot-driven material, as so much of AMC was in that period (like Janet sleeping with Palmer).