Juggermaw won't work anymore
Before the remake (and revert) Kog had old Trinity, the un-nerfed BorK, and his old un-gimped Ult to provide him with a powerful mid-game spike. Kog wasn't the strongest champ late game, but with IE and a pair of Dancers the raw stats he was tossing around late game were pretty intense.
Since then, Kog has lost nearly all of those tools. He doesn't really hit his stride anymore until the deep late game. Without that crazy mid-game power spike to co-ordinate team fights and skirmishes around, the Juggermaw comp completely falls apart. For Juggermaw to work, Kog must have a very powerful mid game and a solid late game. His team needs its damage to kick in when team fights start happening, or the whole thing is totally pointless.
Look, Riot, it's pretty clear you guys don't have a very solid grasp on what made Juggermaw actually work. And I don't fault you for it. The number of people with extensive experience playing Kog is... minimal. To say the least. Kog mains know our champ. Talk to us. Please. We can help you guys hash something out. We can identify potential issues. We can provide ideas and insights into Kog's nuances. You just have to work with us this time instead of acting unilaterally.