Ability hitboxes need another pass over.
Watch the section from 20:43 - 20:54 at 1/4 speed.
Very irksome that so many abilities still have a larger hitbox than their animation.... when some do not. The Lee Sin Q whiffs by a good 10 pixels... but still connects while the Cait R is literally one pixel off of Janna but bypasses her. This gets even worse with some of the newer skins with funky graphics. The pulsefire/project skins in general are TERRIBLE for this.. and actually offer noticable gameplay advantages.