I'll give you this, Riot. Minimum W damage is a good way to buff Kog's early game
Without buffing late, I mean. Good call. Three extra damage per attack at level one might not seem like much, but that stuff adds up!
Though in all seriousness, Kog's biggest problem is that his W lasts long enough for skirmishes, but it craps out in the middle of team-fights. There's a reason why it used to last 8 seconds. Given that Kog's whole thing is high sustained damage it seems weird that his sustained damage is cooldown-locked late game.
If I want a hyper-carry that annihilates a whole team in a few seconds, why wouldn't I pick Twitch instead?