You know...some people think parsing in general would "solve" bad DPS, but now I think it wouldn't do a darn thing for this reason only; if a DPS can't be bothered to use proper rotations, what makes you think them seeing a low number is going to push them to learn? They clearly don't care about how much damage they're pumping out and they don't listen to others about improving their rotations, so an automated number displayer won't do jack.