Riot, you need to explain your game better.
I've been playing this game for over 2 years now, and what has really struck me is how much extra effort it takes to figure out how this game works. In fact, there is nothing in the client, or the front page of LoL's website that adequately describes how stats like Armor, MR, & Penetration work. I've had to actively search through lol wiki, and other outside resources, to be able to actually understand how this game works. Stats that have additive stacking vs. multiplicative stacking (and how multiplicative stacking ITSELF works), different types of CC and how they interact with champions, champion ability scaling... the list goes on. None of this information is easily accessible.
As it is right now, there is a huge barrier for entry, and an even bigger barrier for true understanding of the game. I'm sure this will fall on deaf ears, but it's just something that has been bugging me for quite some time now.