Apt analysis
For vansh , yes that man has changed . The person who paralysed riddhima so that she doesnot dig into ragini truth is not traumatising her. He has fear of losing her
For riddhima as u said atleast she is not going into conclusion that vansh is involved , and she has all rights to know abt her parents but she is not thinking abt the person who is giving her clue
For even microsec she is not thinking that why kabir wanna help her