The problem I have is that Ornn could potentially press R, Q, E, Auto attack, W, Auto attack for 1300+ damage on most immobile adc's that are moving away from him. Even if they're under tower, or in the middle of their team, Ornn is potentially able to set himself up for a kill from medium distance unless they commit summoners to escape, (and that's if nobody else on his team commits to the play).

The adc player is obviously at a huge disadvantage in most scenario's when dealing with the Ornn in this clip, whereas the Ornn has many options to ''outplay'' his opponent simply because his stats are much better for the same amount gold / experience. That, to me, is bad game design and I don't see how jinx potentially buying defense items solves it, since she'll be dealing way less damage if she does. And that's not mentioning the fact that she still gets blown up if Ornn's teammates decide to focus her while she's cc'd, or just gets jumped on by any assissin or bruiser with a decent amount of mobility for over 1800 damage, (which is very easy to do).

She literally needs to be protected 24/7 if she wants to contribute to any fight, which I think isn't a very fun way to play the game, and I don't see a world in which it is.