The voices did sound a bit odd to me, but I'll wait till the full version with better quality sounds to pass judgement.
I like the new sound when a vehicle is immobilized. It sounds like a car knocking and pinging after it shuts off instead of a grinding noise. The sound of the clip ejecting from the Garand sounds cool. One weird thing was just after the first shots in a scenario were fired, a sergeant told his men to reload. This could have been happening in CMBO, but I wouldn't know it.