mP - "Perhaps the answer is also related to the fact its bloody hard to keep writing books. The more you write the more evidence you leave for redicule and examination."
Damn, I hadn't even thought of that.
They're not releasing less and less (new and fresh) Bookstudy-type material because they eliminated Bookstudy night; they eliminated Bookstudy night because they have less and less (new and fresh) Bookstudy-type material they can release...
Like HarryMac said about the Revelation book; even though it's Watchtower canon, they can't keep recycling the same stuff over and over, especially if there's a case of collective writer's block developing in the Writing Department in the form of a dwindling pool of talent.
I mean, the writing and publishing arm of the WTS must be feeling the effects of the same brain drain the R&F is experiencing, by now, right?