Check out this gem from the Dec 2013 KM which explains why it's good to over this book a second go round.
"Congregations previously considered this book during 2004 and 2005. However,for many of the approximately two million publishers who have come into the truth since then,this will be the first time that Jehovah’s endearing qualities have been discussed in detail.For those who studied the book before, the review will help them to deepen their appreciation forJehovah’s attributes.—Ps.119:14"
I gotta kick out of this because I can only think of maybe two or three new ones in our congregation who weren't present when this book was first studied. At the same time, going over Jehovah's qualities isn't something new. That quote from above makes it seem like we don't discuss Jehovah over and over again. Heck, we're called Jehovah's Witnesses for a reason. Not that it wasn't evident before, but I swear new ideas and material are pretty much vacant anymore. If we do the Revelation book in 2015..............