From what I'm hearing, every 'control' deck except renolock isn't very viable, but Renolock is good enough by itself. It's also somewhere between midrange and control, really. It's just very difficult to play, so at lower ranks control is effectively dead. It's all pirate aggro variants and midrange decks so far.
Control warrior is in a bad spot, as the super aggro decks beat it too quick and jade druid just automatically beats any fatigue strategy. For ladder purposes, you want to stay way from it as a result. All these things would be different in a tournament setting, of course.