This is borrowing from / building on @Anonymous's comment elsewhere in the forum ( http://forums.autodesk.com/t5/api-and-scripts/plans-to-create-a-real-install-ux-for-addons/m-p/5828372#M786 ) but there should be a (currated) market for plugins so if users go to «add-ins», they can install plugins without having to go through the OS installation process [though you should be very careful to ensure that those are sandboxed and easily removable]