Just some suggestions.
1) shorten the load animations. I have the game pinned to my taskbar, whenever im browsing the web i open it windowed and play around while watching a video or something, its become a sort of time killer game.
The key to the game becoming this commonly played is short loading times, which volo airsport seems to have, but its the opening animations that bug me.
I think it would be nice to skip all of the "News, [press any button to start], [play]" stuff. just straight to the start selection. just add some of the menu items to the start selection.
2)"Show trajectory" off by default. I understand why you have it - to help new players, but i really think it should not be used. Volo airsport is a wonderfull game about your delicate interaction with the air, having this trajectory focuses your eyes on just the point that youre heading towards. Its hard to describe but i think having it on disassociates players from the environment and actual flight mechanics. But this may just be because i know how to play.
I play with stall and roll limiter 0, aswell as neutral pitch attidute (which doesnt seem to display negative values towards the left side, except -1.). 1600dpi mouse 0.1 wingsuit sensitivity and 0.2 parachute. I really like the raw feel and hate any assists.
close arms is mouse1
cannonball is mouse 2
parachute open: space
3) simpler camera. i find it impossible to practically look at something with it. its cinematic but not functional at all. also parachute controls still work when looking around (mouse and keyboard).
4) quick mute. just a keybinding or a little button to mute just the music and/or gamesound.