Well honestly you're not wrong. Back when the 09 film came out I was excited about the possibility of seeing old villains again. As the saying goes be careful what you wish for. I suppose I just thought they'd have more sense than to try and pass off someone completely and utterly unlike the original actor and character as that character - without even any explanation as to why the character was so different. Maybe with a villain less memorable than Khan they might have gotten away with it.
Who do you think would make a good Khan........with the wig?