You mean gunshots and explosions?
Didn't they stated they wanted to go with realistic sounds this time instead of hollywood ones?
Because if you've heard a gun from some distance, it certainly does not sound as is portrayed in coh2 and coh3 indeed is more realistic here.
I dont mind a more realistic approach as long as they still adjust it, fitting the eye-candy. (Its a casual game after all)
That said my main problem with the sound in the play test was simply that the sound mixing and volume were all over the place and made it impossible to pinpoint where each sound was coming from. Reinforcing the notion that often times the game just did blend in to a blurr. (Helped by the lighting issues and unfinished graphics)
I Especially had problems with far off noises being way louder than the sounds happening on screen.