After seeing today's episode, where Ananya tells Raj everything that happened since Viraj sabotaged her program, I'm getting the sense that the serial is indeed on its way out. Or else, they wouldn't be uncovering so many mysteries so soon. As it is, Ananya had asked Sanjay to leave town for a few weeks, and yet, he was back.
I don't think it's worth making the TRP arguments any more, since we have no idea what happened to TRPs since HC's, and then Sriti's, exits from the show. Without that data, arguing about whether Viraj or Raghav was responsible for the show dipping is worthless. Besides, the current track has been pretty good, so even if the TRPs were bad, it doesn't imply anything about the show itself. The TRPs were good throughout the time that the show sucked, so that reveals little, other than public tastes.
P.S. VB note: We know that you all have differences of opinion as to why this serial tanked. Please don't make that a pretext for starting fights or casting snide remarks at others. I'd hate to have to raise WLs for people when the serial is drawing to a close.