User blog comment:Freedfg/Is vayne TOO versatile?/@comment-4593717-20130720042757/@comment-5556439-20130724123557

BotRK is one of the few items in LoL that "scale". Thornmail and the unique passive: Mana Charge, are other mentions. The item is incredibly weak early game but ramps up in power and out-does BT for cost efficiency around Mid game. Its heaven for AS scaling carry's like Kog and Vayne but absolutely trash for AD/Crit stackers like Graves.

To say Blade is overpowered is more or less saying that you have minimal knowledge of AD carry power-spikes and how they level. Its technically unpowered due to how it scales but it does its job perfectly of being a Hybrid damage/utility item so I dont want it to be fixed in anyway.