I don't remember whether any one of the top voted contestants were eliminated in previous seasons like Sawai in this season. Most probably no. They think they are now Super Hero as the show has been securing decent TRP consistently. They should remember, the show is achieving the TRP only for the outstanding contestants they have in this season. Without such contestants, the show would fail measurably.
However, top voted contestants were pushed to bottom positions as per judges' score in earlier seasons as well.
Push top voted to bottom I can understand it's mostly to give a feel they are not showing bias to audience. But this time its really strange. The fact that we can guess who will be in bottom 2 even before episode air so accurately shows how illogical the competition became. Not sure why they are spoiling image of the show like this.