The game could do with better audio. It isn't too bad, especially with a few dozen titans going, but certainly could do with the supersonic snaps and cracks from the exhaust and the aerodynamic over-pressure created during max Q.
The problem with something like the sonic booms (which sounds like they were taken from an FH landing video) is you don't hear them from the perspective of the rocket/craft itself, which is where 'you' are when you're in control of it. And it would happen alot earlier because you're subsonic throughout that entire video.