I'm also disappointed with the default sounds released with this product, and also hope Blue Sky Star releases an improvement. Their other packages are amazing and immersive!
I agree. I think they almost feel rushed or incomplete. Something is missing. TSS's newly released E175 sounds are spot on excellent - I suppose I was expecting something similar with this product. Love how they were able to change the sound effect based upon camera location with that product (ie: more engine noise near the front of the engine and more "rumble" behind the wing.) Amazing!
I suppose it's a challenge for developers to please everyone - I do know the CR7/9 is rather quiet up front in terms of engine noise, though.