Keep it primitive. Keep it caveman. Keep it challenging.
If you want to know how much dps you are doing, record yourself with Fraps, go back and watch the video, add up all the numbers and divide by the amount of seconds in the video.
Sound ridiculous? Yeah, so do threat meters in the place of LEARNING HOW TO PLAY.
The arguments for buffs/debuffs being too jumbled and confusing is legit, all else are unnecessary replacements for learning to play.