Quote Originally Posted by WinterLuna View Post
There are DPS guides all over the internet that take two minutes to look through and check if your rotation is correct. There are simple guides, and crazy in-depth guides telling you your BiS and every single cool down you can use and when to use it. Having something implemented in game isn't going to help any more than these guides do. If someone doesn't care about their DPS, then they will simply ignore whatever they implement in game.

For the people that do care, they most likely parse themselves, read detailed guides and practice their rotations.

If someone doesn't care about their DPS, nothing will make them care, whether it's an in game feature or not.
I am not sure if things are so black and white. While people who care more will naturally go out of their way to learn more, that doesn't mean that people wouldn't care if they saw they are performing poorly. Having in-game feedback showing that you are underperforming may provide enough incentive for some players to improve. There will still be the top min-maxers and the people who auto-attack watching netflix, but there are a great many more people who fall in between those two categories.