Master Yi, Xin Zhao, Jarvan IV, Jax, Warwick, Nocturne, Udyr, Volibear, are ridiculously OP because of Feral Flare. They aren't even nerfing it. They're just increasing the cost of the item and making you kill 5 more big creeps. Then you can proceed to snowball and destroy everything once the wriggles turns into a FF. Only thing that'll change is making junglers stay in the jungle longer until they get the FF.