Injustice is too big a term I would say. If only Mahek, Laxmi and Shonali were given a chance for WC entry then its not fair to rest of them not only PM.
If all of them are considered leaving PM behind, then its little unfair but I would say, she still got chance to come back and stay for another week. WC entry is a big lottery you never know whether you would hit it or not..I guess she played smartly by coming back and earning some mullah in the process instead of taking a chance with WC.
For PM it was a win-win situation!