I also feel the same. Sonali and Nandita won't get exposed so soon, unless Sony has issued some ultimatum. So far not heard any off-air rumours. So only RV will be proved wrong.
Marriage may happen, further igniting Sonali to become more evil. So even if they get married, they won't be peaceful. She will first use Manna-Ishaan-Barkha love triangle against Nikvi and then may create problems between Gagan-Badal-Harsh too.
As of now, the "grown up" kids have become dummy pieces, doing nothing meaningful in the show.
For audience it is double-edged sword, whether or not Nikvi get married.
But since this Pallavi's insecurities track has come up, I feel somewhere later in the show, they will portray Pallavi as a very successful woman. Makers may even change her look. From a simple saree-clad Pallavi to a modern professional Pallavi.
There are many ways in which such tracks have been presented by Ekta before. But, for now, I don't have the patience to type potential tracks. May be later when I get clear signs of such a track coming up.