I finally managed to get in a game after the beta only being available during CET night time and then some "server unavailable" errors. The game is player-hosted ie peer-to-peer, an easily exploited netcode intended to minimize the publishers expenses despite gaining revenue through the cash shop.
Additionally there is a forced mouse smoothing with no menu option to disable it, though being an UE3 game there's definitely a .ini to edit to disable this smoothing. Nevertheless I uninstalled it after playing 10 minutes.