Ooooookay, so about that Kog buff incoming
Rageblade feels like a pretty darn viable first item on Kog again, the base attack speed helps a ton. Combined with the generally lower level of MR...
As crazy as this might sound coming from me?
Riot, I would suggest holding off on the PBE Kog buff for at least one patch to see how the itemization changes impact Kog before making his 0-counterplay ability stronger.
Yours truly, A Way Too Persistent Kog Main