I dunno who is hotter Fahad the real actor or the character.LOLZ
Pasha's appeal is because of the actor, Fahad, not the character.
The casting director knows that the audience for the drama is mostly women, so they cast a good looking guy in the bad boy role. If Pasha was played by the actor playing Mazahir or, worse, Moon, there would be no sympathy for him.
Just looking at Pasha's character, he is a very weak, insecure person. He only bosses around women and weak men. He is so afraid of competition from other men that he has to keep Mahnoor locked away. This is not the behavior of a strong, confident man who is sure of his charm.
Also, I keep waiting for Moon to get punished but I don't think that will ever happen. Pakistani society still blames the rape victim. Moon just walks away from his crime, calling it a 'momentary lapse' or a 'mistake' -- like making an illegal right turn on the road or eating a rotten piece of fruit...