I think it's the slow pace first, Imli started planning in the 4th week after the leap and so far Karan's plans aren't clear. The lack of pace even affected TRPs before leap, the show has been slowly losing viewers since the second week after Suraj got his memory back.
The second reason is the lack of drama, what did we get last week? Imli talking to Chagan/Bhuka, Gauri winning the prize and Karan refusing to come to Azaadganj and then reaching there. Maybe it could've been more exciting if done better but it wasn't.
The third reason is execution, watch any old episode and see how often the scene would change, every 3 or 4 minutes, now we get long scenes and long dialogues and Sukor are almost always together which forces them to have longer scenes because they have few actors.
I don't think young viewers contribute much to TRPs since they mostly watch online and Saanvi has been the best thing about this leap beside this modern Suraj. It's families that matter.
It's hard to judge if viewers will like the track or not because CVs aren't giving the track a chance with the extreme dragging, also until last Friday it looked likely that Karan would be an obsessive lover but now it's clear he is after power, so it's only this week that the track took shape.
It's only this week that Imli and Karan have had significant ss, the past weeks they had few scene, Imli in particular had very few scenes, so I don't think it's because of her, ghulam track had very good TRPs and she took center stage then, if viewers can forgive keeping her over KN, why wouldn't they forgive keeping her over RV?
The show didn't drop much this week compared to other shows, the big drop was the week before.