They are not suposed to encourage you to play GBG. They are supposed to bring more balance to GBG.
The may say they aim to bring balance to GBG, but that is not what they do. So long as they retain the old matchmaking system, we must believe that what they want to do is see overpromoted guilds crushed and humiliated, and with the new ranking table they want to see strong guilds demoted and humiliated too. I think the actual purpose is to discourage players from playing at all.