What was their last comment on the issue? Last I recall, they were willing to allow the partakers and count the numbers without any judgment, since it was left to Jehovah to determine who has the Heavenly calling. I don't think there's anything else they can do, either they leave it as-is or... what? Write articles critical of those who partake? Tell the partakers to be more stringent in their determination of what the Heavenly calling feels like? It seems like those options would insult and perhaps alienate them.
I suppose they could find some way to reinterpret the scriptures and come up with a new explanation that accounts for the rise in partakers. But that could also encourage even more people to partake, which I am assuming they don't want (although, again, the new interpretation could do away with that concern as well).