Emote/Recall animations that move the model far from the hitbox
There are many backing and dancing animations that move the visual model of the character away from where their hitbox actually is (which is always directly underneath the health bar). This is something I've never once seen addressed on the boards... partially because of how extremely small the opportunity for it to matter is. But it could make a difference. Lee Sin and Brand's dances are prime examples, as they move completely out of their actual hitboxes when they dance. And that in itself is a problem with visual clarity.
The only solution I can think of for this would be to make it so champions always dance in place, regardless of the style of their dance. That is, if it even needs a solution in the first place.