Rogue trooper :
We get your point, you want collidable trees, thx.
I think everyone here that like to learn how to start a plane/helicopter with every switch possible want collidable trees. It's just that the current engine is not able/capable. It's not Belsimtek's job, nor any other 3rd party developer, but ED's job.
IIRC they said that it might be possbile with the new engine, EDGE(wich is not only Nevada BTW. Nevada is a map that will only be available once EDGE is released, but Gorgia an any other map will be with EDGE too)