Trundle's ice pillar could use a good hitbox check.

Even remotely close to a wall or another champ/minion and your champ goes apeshit trying to find a crack in time to get around it, and it's far larger than the apparent model at a quick glace. (I know it technically occupies the little effects outside of the base of the pillar, but that's just silly for a game where reading skills quickly is needed)