Does it matter?
The BG leader can't do anything special, they just have different chat color/title.
At least in WG, the leader can kick from the raid, which Gevlon famously has been making use of in order to do some social engineering (as you say, it has no real consequences). Even that is going away with 4.0.3.
WG forms an actual raid though, where the BGs form a "BG raid", where no one can be kicked, ready checks can't be made, and there's no raid ID associated.
I'm hoping they make use of the "BG raid" for WG with 4.0.3.