Invisible walls suck, Lack of Immersion, can't fly high enough!

I just finished unlocking flying in the new shadowbringer zones. I can't fly very high! I should be able to fly higher then all the buildings and mountains! The only invisible walls should be the edge of the zone and an invisible walls in the sky that is above every object. In Il Mheg I can't fly higher then the tower in the middle. In the forest place I can't fly higher then the trees. Very frustrating! I hate invisible walls in general and they destroy immersion in the world.