I don't understand why people associate damage meters and other modifications to WoW. These are simple concepts people wanted to improve their game play, nothing more. I think of it as purely feedback, without it how can you ever be better?
We're not asking for duel spec or goblin/panda characters, all we want is a few tools to better improve our gaming experience. I think most people who play MMO's are pretty competitive players and with or without mod's people are going to be called bad, ect. I mention that only because I've seen a trend of people saying these tools or modification will ruin the game for people who can't play at an average level or better.