Dimmable lights no longer have toggle buttons on the tiles? That's something I'd like to see. Even if it's just the ability to tap the tile to toggle the state. But then again, that opens the new window for the device.
So far no craziness, although I haven't really put it through it's paces yet. I have tried selecting all rooms, or devices, or whatever it is, and the rooms aren't changing on me any more. So that's a relief.