Humsafar had more mature backdrop in the later part of the show. Two estranged partners coming together for their terminally ill child. And how the male lead discovers h8s mother's evil intentions. Firtst of all I dont think both the actors of beintehaan will agree to play the parents to 7 year old daughter anytime soon. Secondly the character sketch of male lead of both shows are way too different. Zain is too carefree kind of a guy to realise his own feelings unlike Asher. In humsafar, there was always Sara who turned obcessive lover later, that character is yet to arrive here if there is any. I do not think it will go humsafar way but the premises will be the same I guess. Separation is bound to happen as its primarily a love story nd cannot be rosy all the time.
Regarding the pace, this aaliya leaving incident is the trigger for Zain to realise that unknowingly Aaliya did make her presence felt. He may start acknowledging the relation and get rid of his bondage. Love and its confession is long way to go.
So for the time being, do enjoy the show. If its get worn out, move on. Thats part of life I guess