This is probably a bit dumb and obvious but still putting it here.
The temptation to combine a trip to Japan with a fanfest in the future is far too tempting, however I'm aware since they are in home country there is no need to have Koji doing the live translations to the audience attending. I gather not many non Japanese speaking people will attend the Japan Fan Festival. That being said, if there is popularity perhaps it is not too big a disruption to have some of the stage shows in Japanese and English as the other fan festivals. It opens up the possibility for more international fans to visit as we know NA and EU seemed to have a lot of international visitors. It would be nice to mingle with other people and broaden communities even if there is a language barrier.