This is a joke right? Sorry but if you cant win with a premade group of 4, then I dont know what your doing... Coming up against a group where half of the team is communicating on vent & are full battlemasters is a complete joke, and you may as well just leave when you see them.
Imo having four out of eight is too many for a warzone, to have four there needs to be a warzone cap of ~16 players, enough to influence the path of the warzone but not essencially a 'guarenteed win'. After all whats fun about winning 6-0 in the first 2 minutes of a huttball? You may as well just not bother.
What would be useful is a simple matchmaking system to go with their ranking system they are implementing, so your matched with people of similar abilities.