Quick question, sorry if this was asked but there's a lot of pages and search was not helpful.
Did you thought about adding a Q3DCamera object? Nothing fancy, just a helper/icon to better visualize position and rotation of the camera.
Great plugin btw, been playing with it for two days only but there's a huge potential in it, well done sir!
EDIT: One more question. Displaying plain 2d text in 3d space? Maybe something like 3d SpriteFont?