It will be well cared for! Maybe not loved or really cherished, because what are feels, but Xemnas isn't really into neglect, it's inefficient. It could be worse!

Pooor Xion. At least he won't be sure who she is and thus won't be calling her puppet or replica or stuff unless she actually admits it. Though she isn't anymore. .. I forsee a lot of headaches for everyone in the future.