Instead of just one single ladder for folks to climb, players will belong to a league within one of six different tiers based on their skill. Leagues will be comprised of up to 250 players broken into five divisions (except for the top Challenger tier). Players can rise and fall within the divisions and even work their way into a new league at the next tier.
The new system is detailed in the infographic after the cut; click the image to see the full-res version. And for even more details, check out the official FAQ.