Oh shit, we hit kog maw's W too hard, so we're gunna partially revert that
Because you know, there's nothing wrong with re-buffing the most cancerous part of the little void shit's kit.
They could instead buff Q, or even more interestingly, his R, but no, they are going to add power back into his W, one of the absolute hardest to balance abilities in the game and which single-handedly forced Riot to revert it when it was reworked last year (two years? I don't even remember how long now).