Hmm, I actually like how the gun battle sound effects have gotten louder on my CD player than they used to be. The first few titles that GA produced, you could hear the gunfire, but it was in the background and it sounded "okay". But, now with the later titles (say 2006 and up), GA hits you like a sledgehammer with gunfire, explosions, crashes, etc. I think it enhances the listening experience, even though on occasion a few words might be drowned out.
But, that's just me.