Million Dollar Idea
Put a ping test button (or Live Ping) in the launcher client window so we can see what our ping will be once the game starts.
Currently, I have to start a game before I know what my ping will be. Usually I have to do an ARAM first to make sure my ping is playable, and if it's not then the game will only waste 15-20 minutes. Often, I start a game and find out my ping is 110-300 and then I'm stuck playing a no-chance game, dragging my teammates down. I'm not the only one with unreliable internet. But if I knew what my ping would be before committing to a game, I could either wait it out (saving my team from a useless teammate, them yelling "feeder!" and "report!") or I could troubleshoot the ping before the game starts.
While it's nice that the loading screen shows pings, by that time you're already committed. Show us our ping from client window! Or give us a button to test our ping before we play.
Admittedly, this won't make you a million dollars. But it will help players who don't have permanent gigabit internet, which I'm assuming is a vast majority of your clientele.