Kog is almost like the anti-Kalista

Just as Kalista's remarkable ability to flawlessly kite gives her quite a few unique strengths that no other ADC has, Kog's inability to kite gives him several unique weaknesses that no other ADC has.

It makes it harder for him to kite, obviously. It makes him more vulnerable to skillshots. It makes him uniquely vulnerable to dives. And disengage for that matter. It doubles the effectiveness of OnHit damage block and damage return against him. It places him in a very unfavorable position against short trades. With his W up, his damage against Towers actually drops before seven minutes into the game. And his heavy reliance on OnHit effects means his damage against Towers is probably the lowest among ADCs come late.

Just as Riot underestimated how much of a strength Kalista's hops are when she was created, Riot massively underestimated how much of a weakness Kog's double attack speed with half damage is. But I guess this isn't the first time that the relative power of mobility vs immobility has been misjudged, is it?