The point is fun, players who queue are not farming for anything, they are capped. It's like a PVP place (it should work like an open-world battleground where PVE items matter) standard Alliance ws Horde 'catch a flag' WSG game.
You farm conquest and honor points in arenas and random battlegrounds, but that has nothing to do with this.
What you can farm in this BG is open world kills for example.
Also, for players with currently most kills (one of each class) their statues can be placed in main cities for everyone to see, different characters for Horde and Alliance.