Honestly, I am not sure how they will justify Vansh's criminal activities.
I think the makers did a mistake by making Vansh kill that woman in the first episode. Unless they can justify that the woman was also a terrorist or something, Vansh pushing a woman off the tower is plain and simple murder.
As for Kabir, I feel the actor is really promising, and he is more natural in his acting than Rrahul. But he doesn't have 2 things: hero-like screen presence and chemistry with Helly Shah, which Rrahul has in abundance.
Plus, the makers didnt give any moments to Kabir-Riddhima to build their romance. That has also caused a gap between the pair and the audience.