It's possible. They didn't make a big thing of the mugging. I thought she would end up in hospital and it would be this big dramatic storyline, but it seems they decided not to do that. So maybe the reason is that they are saving all that for the death scene.
If they are axing her, she's not coming back. Johnny Allen is in prison for 27 years, so don't see any escape clauses in that one either. So it seems the family is dead.
It is going to be sad for Stacey. Emotional because of the pregnancy (guessing), and then having the Ruby stuff on top of that. Hopefully she would have made a will, involving Stacey.
I included Stacey in this, so hopefully it's o.k!