The latest build brings improvements to the notification shade. You can now choose the grid layout for the toggles and also choose to have the brightness slider at the top of the toggles. The update also gets rid of the Edge feeds feature. Other than that, there are a bunch of minor improvements and bug fixes but the update also has some issues of its own, such as the slow lighting of the screen when you wake up the phone and intermittent Wi-Fi disconnections.
The update can be downloaded as an OTA if you're running the previous builds of the beta build.