Add more usable blocks. For example...
-Ballasts with releasable water/sand
-More powerful engines
-More types of engines
-Block that can mount wings onto curves
-Larger cockpits
Add more usable options. For example...
-Setting nose cones of whatever to the cockpit
-Add the option to release material from fuel tanks, ect
-Add the option to refuel
-Add the option to have multiple planes in one realm
-Add the option to create/load/use/download more realms
-Add the option to play eco-oriented modes where money is critical
(for example, you could have to fly 30,000ft, land, and use less th-
(an $500,000)
Thanks for your time!