Re: Orci, Kurtzman and Lindelof should not Return.
I think a simple "I informed Starfleet that you're a terrorist that needs to be taken out for blah blah blah" would have sufficed.
But he does explain exactly his reasoning for destroying the Enterprise. Does it really take that huge of a leap to think that he was already in contact with Starfleet?
The writing of the film suffers in two areas for me: the transition from John Harrison to Khan and the explanation for the torpedoes is really rough and both could've used more time in the writers' room.
"...the most elementary and valuable statement in science, the beginning of wisdom, is I do not know." - Lt. Commander Data, "Where Silence Has Lease"