I think it was mentioned in the article that they go against drm-next-radeon.

On the other hand I kinda feel like power management will still take a lot of time so probably it will be decent around the end of the year.

What I don't get is why didn't AMD appoint a guy from their pm department to help out here? Seriously, he/she would have already been aware of 80% of the problems and knew the best solution without further thinking...