SE should add an in-game personal parser that gives you your own stats on how you're doing, both moment-to-moment and overall through the course of a fight or dungeon run. It should have stats on DPS, aggro, and both useful and wasted HPS. It's useful information that lots of players want for improving their gameplay.

It should not under any circumstance, however, give you anybody else's stats, which serve no purpose at all except to grief other players with. Their performance is up to them to improve, not you, and if they want to ask for advice in that endeavor, they have several avenues through which to do so.

Then, along with that, SE should also remove enough of the details from the combat log pertaining to other players' damage to break the illegal third party parsers' ability to provide accurate numbers. That way, PC players willing to break the rules don't get that "advantage" by doing so.