BoRK nerf from Yi main perspective

First reaction was slight apprehension about it being a Yi nerf, since BoRk is a very core item on him.

But, if it is nerfed to the point where it is not the best item every game, that would make Yi's build paths much more interesting. The current PBE nerf doesn't quite do that -- I'd suggest reducing lifesteal to 10%, and reducing attack damage by 10. Then it would be an anti-health item, not the always-buy item it is now. And if some compensation buff can be given to its core users, great. For Yi... 2 AD? Or .4 AD/level? Those would keep power level about the same, while making build path more situational, rather than the current "always BoRK"!