Rehan is not born as an evil person. He also knew love . He loved his mother and Zaisha (pardon me if I dont remember the name right). It is in the course of his life that he had to face some unfortunate situations that left him with bitter feelings. He also felt betrayed and it was pure vengeance thar he wanted to take on Abhay. He had a bad childhood and hence had not learned to respect someone's life. Obviously people around him did not accept or respect him as an individual . So he just thought Piya as a tool, instead of a person and did not have a moments hesitation to harm her just to take revenge on Abhay. I am not saying what he did is right or justified. But when it comes to the question of killing him, I would say he ought to be given a chance. I mean that he is not to be let of so easily but he definitly needs some one (either Alina or Liana) to make him understand the importance of life. Again it all depends on the intensity of the feelings Alina or Liana has for him and how much he would want to listen to them.
Regarding the pairing of Liana and Rehan, it again depends on how strong her feelings are for Rehan. She may have liked him. But would she have him even after knowing how scheming and insensitive he is. I would say that Rehan should not be killed in the fight but defeated and when Rehan is defeated, his fate should be left to the decision of Alina or Liana..
Having said that I would still say he is not a person to be trusted. He had always been an opportunist and plays his own rules. If his life is spared, one has always have to keep an eye on him.
In the last week's update, Advik's words only kept people in a confused state of mind not knowing what or whom to believe and not knowing which action might end up right or wrong. If not for Rehan current weeks action scene bringing every one together to fight for one cause and give an opportunity to understand each other would not have arised (I am yet to comment on the episode)
Sometimes , for somethings to get triggered we do need mean people like Rehan to exist.
My thanks to Shreya for making me think that if given a chance, Rehan might change, is all because of Sid in her T&A.
Sorry for the typos because I am still not used to typing from mibile phone.