I know its a nitpick but, minion spawning animation.
Since riot has gone through all that trouble to make the new monsters spawn much more impressively making them seem more alive, why dont they go one tiny step further and give them minions a cute little portal to waddle out of. minons are a fundamentatal part of the game, and rather than just appearing out of nowhere, i think they should get their grand entrance to the arena as well! (just fightin' for the little guys that make it all happen)