I don't really think that Sakshi would do anything after finding out that PPW is evil.
Sakshi will just try and change Suraj's submissive and sub-serviant behaviour towards PPW, but both of them would be ones that would try and win PPW over with their love, rather than get her back with revenge.
Maybe that's how we'll see the show progress.
PPW tortures Phool and Sakshi, while she's nice to Kamini.
Ratan falls in love with Phool and starts to defend his wife, creating distances in the relationship.
Suraj finds out about PPW and his torture over the years, but he's still nice and respectful towards her.
Then Kamini turns and backstabs PPW, and then she realizes that her other 2 bahus are better.
Before, during Bindya's time, PPW never changed cause she was always the evil one in the situation, she was always in charge, but now, meeting someone head on, she might not be up to the challenge
Yuks