I already posted this on one of the 48 other threads currently running on this subject. Might as well put it here too
I think, possibly, that the sound may have been an area they felt they could get away with temporarily given the amount of other things that obviously were unfinished.
Because sound is pretty much a 'bolt on' self-contained module that doesn't impact on or potentially break any other features of the sim, it may have been viewed as being of low importance at this stage. There are many other areas where not getting it right will cause problems elsewhere - quite a few which are still being fixed now
. Priority would have been given to them.
The question is what their strategy will be for addressing this in the future? With modding potential being built in as a base feature of CoD I think it's very possible that their thinking always may have been to leave it to third parties.
When the SDK is released I suspect sound will be one of the easiest things to change - either by some of the modders who have worked on il2, or by other companies (success of CoD obviously a requirement here).
I could imagine a variety of 'soundpacks' being available - as well as 3rd-party created crew chat, radio comms chat, etc.
As we saw with features in old il2 those specialising in one small niche can often devote more time and effort to getting it really good than the original developers can.