its going to be really difficult to buff kog maw to a reasonable level without making him flat out broken.
with the range and attack speed increase on his new w he would be able to poke the shit out of any lane opponent every time its off cooldown.
tbh im not even sure if kog is too weak right now, or essence reaver adc arent just way too strong. and then look at his lategame competition. jinx and vayne.
both are self reliant to a point that its stupid and bring similar damage to the table.
imo, nerf essence reaver, nerf vaynes lategame damage, nerf jinx ability to self peel. the way i see a lategame adc is exactly like kog and twitch. tons of damage, but incapable of surviving without protection.
riot has been breaking this rule too many times. jinx is almost an ad scaling utility mage with a twitch ult on her q, and vayne has so much outplay potential that she can practically 1v2 a lot of champs lategame.