No, I have no doubt about Sanaya's professionalism and work ethic. I remember how excited she was to get the role of Paro and a show like RR. She knew it would be challenging for an urban girl like her but she relished it and put in her all. She worked on her body language, had language tutor on sets, even the writer of the show said Sanaya was working tremendously hard, hence Paro is receiving appreciation. You must have missed her interviews I think, where she repeatedly said she loves all her shows and characters she played whether they were successful or not. I think she did a fab job as Paro and won much appreciation from media, critiques and viewers.
Of course you may not have liked her performance as much which is fine, everyone does not have to like everything an actor does, but that does not take away from the artist's talent or hard work. Sanaya always maintained how much she loves the work she does. Yes, she loved playing Khushi, saying that does not mean she can never be as committed to any other role.