H2H was a big boon for the game, both for testing of bugs and for just screwing around with friends. Problem was that it gave the hackers a playground to test their systems out as well. I would suspect they're creating H2H that you have to pay for in order to discourage that sort of thing. (I can see the counterpoint of "they can test just as easily in a paid-for H2H as in a free one" coming, but if that were the case, the MAs would currently be flooded with cheaters.) Previously, whoever created the room actually became the Host, aka the game server. I suspect that leads to people being able to probe at server code, which became a big no-no. With a system hosted by HTC, that isn't a problem.
I can't wait for it, really. Especially because I'd love to test some quirks in tanks and armor modeling. That recent bug with the Sherman's mantlet armor could have been figured out quickly out-of-house if we had a sandbox.