Love how the Enterprise has torpedo tubes on the side of the secondary hull. She can fire broadsides like an ancient galleon! Just one of the many many cool aspects of the film.
See, that just makes sense to me, too. Having weapons only in the fore or aft of the ship is silly, and leaves much of your ship unprotected.
I'm still on the fence about the broadside tubes. In the old galleon days they made sense because most combat happened close, and a cannon fired a dumb projectile.
The torpedoes in Star Trek are smart, in the sense that they can be aimed in various ways (preprogrammed to hit a target a certain way). I think the only advantage of the torp launchers shown in STID is the sheer number of projectiles that can be fired off simultaneously. We've gone from 2 front and 1 rear in the prime universe, to 2 front, 1 rear, and 6 on each side.
Looks like Starfleet has been arming up (in the wake of Nero).