Mis-cast of Characters

I saw the movie and I absolutely loved the acting and the plot but I had problems with two characters- Joe(Arjun Rampal) and Aditya(Farhan Akhtar)- Joe seemed less aggressive after growing mustache and Aditya seemed afraid to speak and his voice lacks confidence. I guess it would have been a beautiful movie had Joe been instead played Sunny Deol preferably as an angry Sikh guitarist, and the role of Aditya by Ajay Devgan. What do you guys think?