I understand what you are trying to say, but can someone explain to me what the veto power actually means? I always assumed it was that if a contestant gets eliminated, or is unable to perform one week they get reinstated in the competition.
From what I have understood, judges can use a Veto power to keep a deserving contestant from being eliminated. 1st week, she didn't perform, she was saved by votes. 2nd week, Veto was used by Judges to keep her in the show. This is the only time veto is used.
Double elimination or no elimination is up to the channels and not judges, as far as I know. So that is definitely not the use of Veto power by judges, for those who seem to have this misconception.
Anyways, from what I can see, judges have only used Veto once to save Isha, a deserving contestant as per them, from elimination. And Veto was introduced last season when Sushant had gone through similar phase (not saying same, so no pouncing please), thus it has become the format of the show just like Wild card.
P.S: This is solely my interpretation from the facts and observations seen on JDJ this season.