Challenger Rating's Purpose
Tell me again how this helps to balance the game? The idea that my champions stats get nerfed anytime I fight an opponent ranked higher than me is just preposterous. Isn't that what class advantage is for? If you're fighting an opponent ranked higher than you it is already an uphill battle. Adding challenger rating just takes that uphill battle, and puts someone at the top of the hill constantly throwing down marbles.
Maybe someone has a better explanation on how it helps to balance the game, but from where I'm sitting it was only introduced to tip the scales, and 95% of the time it's in the A.I.'s favor.