She said to pursue other acting venues.......prime time, movies, etc. But that seems to be the "reason" given whenever an actor decides to leave. In the last few years, it was Freddie Smith (Sonny), Kate Mansi (Abby), Camilla Banus (Gabi), Jen Lilley (Theresa), Casey Diedrich (Chad), Jay Kenneth Johnson (Philip), Alison Sweeney (Sami), ....and more. Every one giving the same reason. Sometimes, an actor just gets burnt out in a role, like James Scott (EJ) did....so they just want a rest from it.
And obviously, since some actors get asked back and refuse....they really were no longer interested in returning.