On Armory -> Character's Name, you can view someone's match history, from there you can see the team that played with [2v2][3v3] etc..
If the character changes name, you still can track him/her if you can remember it's temmate name by simply searching it. From this point, taking a look on it's temmates Match History you ll be able to track the character you want, even after the name change. Same thing as a matter of Boss Fights on Guilds.
Indeed, but this is not my point.
If i want to change name, obviously people that have me in their Friend List, with a tag let's say, they will know i changed name.
My point is : Even if i Faction Change, people can still found you through your Arena Partner's Match History with yout newer name, even in the opposite Faction.
Is this intended to work on this way?
Maybe some people don't want others to know their idenity in the other faction, that's what i meant.