If I could change one thing in this movie it would be to edit out Amazing Grace.
You have something to say about Scotty's playin' ?
Actually, it makes sense to have that there. Remember that Spock entered the Reliant's prefix code just moments earlier to lower its shields, so it's possible a schematic of the ship appeared on the tactical display to confirm that the shields were down.
Nice. I would never have thought of that. Of course, in the real world, it was a mistake, but that's an elegant way to explain it in-universe.