There is something that wasn't addressed.
What if I were on a building and used this?
I believe that I would be able to go as high as I could jump from the point of the building but once I did that I wouldn't be able to ascend. I would only be able to go down.
And say I went down and moved off the point of the building and just into air I wouldn't be able to ascend back to that point either.
Essentially, allowing flight in circumstances where it makes sense that you can fly but since it is only passive flight it shouldn't be a cheap excuse around the height limit.