Devlog - January 6, 2025:
Arena teams have been an important part of the game from TBC until late MoP. In Patch 5.4.0 (and WotLK Classic) they were replaced by personal arena stats. We think Arena Teams are a good feature, it adds personality to the game, it makes you 'bond' with your Arena Partners as it requires effort from all members to get an Arena Team to high ratings, team names also add a certain charm.
There is one big downside however, it makes playing arena with your friends a lot harder as you lose your win/lose stats and team rating when you switch to a different team.