This is not new. He has not looked good there this season. The only time he has been successful is posting up the small pg's, and even that hasn't been consistent. Play Miller as many minutes as humanly possible. Use Rudy as the back-up. Hell, use Mills before you put Roy back there again. This is not just anger at the loss, or Roy's shockingly bad performance. I've said this since Nate started using him as a bck-up pg. He doesn't suit the position, and it destroys his confidence having to play there.
Please let this be the last time Roy plays pg!