Kirk's rusty, not lost in dreamland. The Kirk and Spock friendship is a huge part of the movie, yet Kirk, right after consulting Spock throughout the battle with Khan, fails to notice his absence of his BFF in what might be their last few seconds of life?
A supervolcano could plausibly end life on an alien planet (link). Wrath of Khan is probably the worst film to attempt to battle nitpicks with - from the Reliant miscounting planets at the start, to Marla somehow being the inspiration for Khan's rampage, to the Genesis device somehow turning a nebula into a planet with it's own star, you're barking up the wrong tree. Personally not liking ID is enough.
A supervolcano could plausibly end life on an alien planet (link). Wrath of Khan is probably the worst film to attempt to battle nitpicks with - from the Reliant miscounting planets at the start, to Marla somehow being the inspiration for Khan's rampage, to the Genesis device somehow turning a nebula into a planet with it's own star, you're barking up the wrong tree. Personally not liking ID is enough.