If people want Nicole off the show due to what she has done, then they MUST desire for the show to be cancelled. To be fair, pretty much EVERY character would have to be let go. Nicole is NO WORSE than certain other characters, and she has even more potential.
They could make her and EJ stick together and rule Salem as the new terror team, or they could have Nicole find out she is Melanie's mother and that would be excellent to watch, or they could make her drunk all the time again and that, too, is fun to watch.
Her possibilities are endless, while certain other character are still on doing the same thing they have always done, or are too busy being ruined by the writers.