I don't have a problem with using Khan in the film. I have a problem with HOW he was used.
I absolutely agree with the notion that these new Trek films need to cater somewhat to the "crowd pleaser" mentality. The simple fact is that Star Trek fans alone are not enough to create the kinds of box office numbers Hollywood wants to see these days. The films need to reach out to a wider audience. And Khan *is* a pop culture icon.
But Abrams brought a high performance sports car into the franchise and limited it to 25mph residential streets.
What I mean is that Khan was inconsequential to the plot as told in the film. He *could* have been just any unnamed terrorist and the story really wouldn't have changed at all. Everything that made Khan unique as a villain was missing from the film. It feels like they wrote this story about an admiral with a secret plot to militarize Starfleet and start a war with the Klingons, and then added Khan in as a neat afterthought.
I *like* the renegade admiral plot.
I *like* bringing Khan into this new franchise.
I just wish it had been done in two different stories that would have better utilized Khan. And I wish the film had paid as much attention to story substance and coherency as it did to casting, special effects, and character interaction.
As it is now, it was fun to watch. But I feel that it could have been fun AND smart.