I honestly don't believe this big conspiracy over who left and who is involved is true. I think it's just as simple as, "Slott didn't want to write them as a couple." He didn't hate the character, he just didn't feel she was necessary, and so wrote her out whenever he didn't need her. Of course, most of those reasons he wrote did end up being really out of character, but that's not exclusive to her, that's a problem with most others.