Amateur observers contribute data all the time, so great that this might spark continued interest for some of those kids. I'm sure their data along with further observations by bigger scopes, as well as the HERA probe planned to revisits the asteroid pair will give better insight into the complex physics that occurred.

I'm guessing the speculation of a now tumbling satellite that has varying pull because of its wobble might be the best one. It would be a real surprise if we found out that the DART probe hit precise dead center of mass and had a perfect vector change with no oddities.