Three times the writers dropped what would have been a great Stephanie storyline. The first was her and her past with Massimo and then regarding her being the brains behind Eric's success at Forrester Creations and of course her abuse by her father which could explain her possessiveness to Ridge and Felicia.
Anyway, if Susan Flannery does ever leave (hope not though), I hope they give her a decent send off like having Massimo coming back and after retaking his company back (his losing it to Nick was dumb) reunites with Stephanie and they move away.
Again, I would hate to lose Susan Flannery from the show and no one could ever be a good recast (except for Constance Towers who was great on Capitol and GH) so it would be a good send off for a terrific actress and character.