My opinion is that there should be dedicated cargo aircraft and combi PAX/Cargo aircraft. The cost for creating bases should also be cheaper and so should the cost of creating a private world. Also, some smaller aircraft should not take 24 days to build and deliver... maybe 12 days or 6 days for the tiny 10 passenger, 1000 nm range planes? Water planes and water ports for water planes and amphibian planes would be good. Lastly weather situations like Arctic and Desert conditions should have an effect on planes and some planes can fly to those conditions, and there should be runway lengths for different airports and only some types can operate from that runway length.
Oh by the way, choices for seating configuration and in-flight food would be nice.
