If they were going to eliminate bookstudy it must not be immediate as a recent KM stated that we will next consider "Live With Jehovah's Day In Mind". Unless they plan to do that through 2008 after the Revelation book and then eliminate bookstudy after we're done with that.
However the bookstudy is a good way to micro-manage and have one overseer keep closer tabs on the people in his group. Also they like to promote the small groups in case persecution would arise, and to keep tabs on the members in case of a disaster or something else.