What? I don't have the beta, but this is definitely a loss.
I like hearing the frantic noises of the last bit of planetary life as it is blasted away by my giant red Vasari laser cannons. I cannot really come up with an adjective to describe the noise, but swooshing is good. But I liked it as an atmosphere thing and see no reason to change it as it was fine before and enjoyable when nothing was going on to just look at your planet and hear the noises.
Please, Stardock, don't bother messing with things like this that may seem minor but if changed for the worse make the game a less absorbing experience. Stick to repairing glitches and bugs and getting the other factions ready for beta.