I think you may see one or two more towers removed. I know that unless they do the "seasonal tower" idea, having 3 towers probabably would just cause a huge mob fest. I think that between 4-6 is where we should stand. I think swamp may be removed and replaced when Babord comes out, if/when it does. Overall, it makes sense to see those two towers removed. Snow had no traffic(as Rufus said in the previous thread) and York was the tower no one wanted. My opinion would be deadwood, seeing as it's probably the last of the less traveled towers. Though I hope it stays, becuase it's my personal favorite.
IMO mod will never be removed. It is the most balanced and trafficked tower in the entire game.