I think it would be a good idea to start another more specific topic ‘‘Glider feature wishlist’’ or something like that, because this thread is there to ask for gliders in general, since they were missing from the beginning.
Missing features or ideas might not get recognized in the comment section.
I have listed some of your ideas in the Thermals, Up & Downdrafts and Realistic Dangerous Weather - Physics Simulation thread.
But for some things like the competition system, broken adverse yaw and so on it might be good to start another topic. That way can vote and point in the right direction 
should go easily into the ‘‘top 10 of the last 3 months’’ list.