In the last wow armory, if you dug into the character xml or the arena team xml, you were able to get team history on that person. In fact, you were even able to get damage and healing stats. I loved it as I had a nice tool that helping me and my guild spot players that were team hoppers or made nice reports of what comp was doing well.
Can we add this in the character or arena feed that shows this information? I believe it might help the community as well to see the chaos around pvp by numbers, not speculation and QQ.