Welcome to F2P, where the base game doesn't matter one bit, but the crap shop (sorry, cash shop) is life. The bare minimum effort will be put into the base game, just enough to get you hooked, and all the rest of the team's effort will go into milking whales. I know a guy who works at NC Soft / Arena Net (GW2), and every team has a quota in the cash shop to meet. If they don't meet that, they will be fined and/or fired. So they will LITERALLY drop everything they're doing to meet that quota, which means less content and effort in the base game.
F2P is a horrible, horrible business model, and breeds crappy games and greedy developers. I have no idea why it became popular, though I have my theories -- most of which involve lazy ass people who can't be bothered to lift a finger pushing gaming to the point that they can just pay their way through everything and win without actually doing anything to deserve to.
But hey, welcome to modern gaming.