I really miss Blade Waltz.
Master Yi's Alpha Strike is the closest thing in the game in terms of mechanics, but it's just not the same. I really want to see a champion in the future have some form of Fiora's old Blade Waltz. I really miss a flashy point-and-click execute. Veigar's R is great and all but it's not as flashy.
I know Blade Waltz was unhealthy for the game, but I'd love to see something similar in the future - perhaps a healthier version?