I can comment on the engine sounds, Blackdog.
I know I have been preaching that CoD will be released as an unfinished game and here it is. There's no way in hell that prop noise drowns out exhaust noise from open stacks when you lean out/sit at the runway. No way Jose. The prop isn't spinning nearly as fast as you'd need to get the tip noise. The engine sounds are too much of a clusterfeck from that Hurri vid. Some are muffled, some aren't. There's no high frequency noise from it what so ever, it sounds like screaming through a pillow. I'm getting some serious WoP vibes from the sounds when he walks through the rpm range.
Doesn't matter if it's an Allison, Merlin, DB or w/e, from an open exhaust engine this is pretty much how you'll hear it, amplified by 10+ IRL:
Earcups will not muffle the sound nearly as much as we see in that vid.
My expectations on this game at release were probably way too high. Good thing the game is very raw at release. The visuals are nice though.