see, a big reason why they're reverting (most of) the kog update is that, while his update is already unhealthy from a gameplay standpoint, he also had a specific niche before the update that gives him his own unique identity.
whereas pre-update graves was basically just a shorter range lucian.
and while he might seem overloaded or arguably unhealthy nowadays, the fact that he has his own identity now lets riot hit him in the specific spots that are making him too strong if necessary.
is he taking too little damage in the jungle? nerf his ability to kite monsters by getting rid of the knockback on his passive. is he dealing too much dps when he should be burstier? extend his reload time, or make his reload time scale less with attack speed, or remove his ability to load in a shot when dashing.
see what i mean? it allows riot to hit more than just numbers and lets graves players feel like they're different from other carry junglers