One of the other major shake-ups in the new update is the leaderboard. Previously, Battlegrounds matches had three leaderboards, one per team, which has now been streamlined into a single one. And lending to the higher-octane nature of 4v4, there's a Competitive Leaderboard too, which does far more than show off how many kills you got.
“We have several different altered reward schemes that we're implementing this update for PvP, which even stretches out to the Imperial City. But for the Battlegrounds themselves, doing the 4v4 competitive matches gets you access to the leaderboard, and that's the only way to get on that leaderboard.