Kog remake goal: Improve Kog's pick rate by giving him a well defined niche
Kog remake result: Kog can only express his niche while his W is active, when it's down he's nothing.
-Kog's poke used to be his fallback when W was down, but now it tickles unless he has a nearly dead target to snipe in addition to having crippling mana costs.
-His mid game Sheen-weaving was effectively neutered, forcing him to all-in with W as his only workable play pattern.
-His base and scaling HP both took a hit, making him even more squishy than he was previously.
-While Kog's early and mid game presence both got kicked in the teeth, the game's underlying mechanics were altered to heavily favor early-game dominate champions.
-Kog's pick-rate and win rate tanked for the above reasons.
It's been two months now, Riot.
'But he might be okay in LCS with twelve Lulus backing him up against a team with no gap closers!' is not a valid reason to leave Kog underwhelming for the vast majority of the people who play him.
Start with the niche you want him to fill. He's supposed to be League's immobile machine-gun tripod?
Fine.
Then let him always be able to do that, just like Graves is always a tanky shotgun guy and Jhin is always a nimble slow-firing sniper guy. Move the double attack speed to his Passive and axe the self destruct. Turn his W into a toggle that roots him. Turn his W into a toggle that consumes mana. Make the cooldown on his W scale down to two seconds of downtime at most. Make it readily available somehow because Kog's whole identity is tied up in that skill. When Kog's whole thing is sustained damage it makes no sense if he can't sustain it.
I trust you guys, Riot. I know you can do Kog right. But the balance team needs to get over this 'But LCS!' hump. The most popular ADC picks in LCS hard counter Kog. The way Summoner's Rift has been set up for this season hard counters Kog. He's not going to be out of control, you guys. It's okay. You can fix him.