At the end of the year,
there is some time left for a fun feature… : auto-rotation of your model.
I’m not really sure whether it is useful to you but we found it cool to have and because we could 
You can activate the auto-rotation in the menu of the viewer :
(model from thingiverse by Gelap)
The on- and off-switching has to happen through the menu, but I think activating it through a double-click might be easier…
Let me know what you think about the feature and whether double-clicking would be useful for you too.
Anyway : Enjoy your rotating model !