Similar situation, yeah it'd be a nice tool to have. If you plan on kicking it off, let me know and I can help contribute a bit.Just haven't had the time to work on it. An add-on installer add-on is still on my list purely due to the number of add-ons I need to install on my own sites when migrating them to XF2.
Otherwise we probably won't do this on our own, as we just haven't had the availability. If things change, will post, but yeah happy to collab instead so we an all save some time.