Since overlay is enabled by default, it should at least be a quick setup on it. Many of people I know turn it off mostly because they don't like how it looks and had no idea you could change it (which should be made more accessible as well).
Personally, I turn off the bounding box and the avatar because its unnecessary and blocks the view and i know that my friends who do keep it do it as well. (maybe it should be set to that way on default? because i believe that's how it was before.)