People will attempt to game the parser system for themselves and others, especially if said information can be looked up and the person judged for content outside of raids. Uploading a parser system will make people a hell of a lot more paranoid about the game and whether they can participate in content, or whether their attempting to learn, or the actions of their teammates, will affect their worth as a player.

You can say that its already out and about, but an official parser would make it official and widespread and all chatter and refusals to work with another person would have the dev's approval all over it. Since there is never any solid information on rotation and mechanics are becoming increasingly deceptive, the game starts to become unfriendly and unfair, especially if you are starting late.