The ability to customize is excellent; especially the new routing abilities on arrival and departures. Really enjoyable to play.
About the only thing I have noticed is that the aircraft type 6 (light, single engine) enter at the same altitudes as the jets and climb and descend at the same rates. The "example" instructions say the descent rates can be adjusted but so far, I have been unable to do so. 100 FPM min and 500 FPM max descending is about right for a light aircraft but nothing I enter seems to override the default.
The only other thing is that light aircraft enter the airspace at the same altitude as the jets. Normally, unpressurized light aircraft would enter below 10,000 and jets above them. Small points in an otherwise great effort. Thank you!