I like him. He's pure dagnasty evil. Kahn, Onaga, Shinnok and Shang Tsung were all after power. Blaze wasn't even evil. Dark Kahn is all about destroying shit, for the sake of destroying shit.
And when you think about it, he has Kahn's skull face and Darkseid's rocky appearance. So in that respect, he does borrow from both. At least he isn't like Composite Superman/Batman.
Oh yeah, and Glam, he has Kahn's projectile deflect move too.