There will always be stuff to get done. It never ends, not the balancing, not the new features, nothing. Until the game is literally abandoned and the servers shut down, there will be an endless list.
Well, with the state the game currently is in, I'm inclined to support faster patching directly to the live servers right now. Let the UAT be used for larger patches that introduce new content, once the devs have addressed the most glaring problems and the game is in a more polished state. They could freeze the UAT for now for all I care, their hands are full enough already.