I have almost the opposite opinion: it seemed to me like the Spock scream was supposed to meld right into the screaming sound the Vengeance made as it barely missed hitting the Enterprise. If anything, it should have been more abrupt, and should have been almost immediately drowned out by Khan's passing.I agree with BillJ's post, except for one thing. The Spock scream bothers me, and I just realized why.
The build up of the reversed-parallel scene was almost right.
I think it would have worked better if Spock let the tension build in his face exactly like Shatner did in TWOK. But instead of the scream, he should have remained silent and then went on to beat the batcrap out of Khan. After his speech about choosing not to feel, releasing all the pent up emotion at that moment seemed a little soon.
Saving the outburst for later would have made it perfect
Thus the sound of the Vengeance plummeting out of the sky might be confused with the sound of a thousand demons conjured straight out of the pit of hell by Spock's unadulterated rage.