I agree, the new sounds are fantastic! I also think the distant sounds fade to soon.
I noticed that, if you place an apc or tank in a town, maybe hidden behind some buildings with his engine on, I can only hear him if I'm close to 70 meters to the location where he stands. Shouldn't I hear his engine way before, maybe 200 to 300 meters to the town?
If they already plan to work on those sounds, or they're not a top priority, or todays tankengines are already pretty silent, then I'm sorry and please don't mind me. :P