If we are extending Miller, we should be going all in to compete for the cup or atleast go deep into the playoffs, Miller is almost 30, he is in his prime now, if we extend him and wait for a couple years for that solid RHD to pair with Quinn, Miller could be on the decline.
So the way I see it, if we are extending Miller, PA/JR are thinking to compete, if we arent going all in, then might as well trade him.