I had a quick look at the archives. In July 2011 when the current LBB 1.69e version came out it was at 84.19% APS!
So that is how good LBB is when its tables are up to date. Scary that after 2 years of inattention and with 30 bots showing a > 20 KNNPBI it is still at #3 with a 76.49% APS.
So even without any code updates just adding those missing bots to its tables would most likely see it reclaim the throne.