Nyeriah did write in the Developer Q/A section that there exist patches for Cross-Faction battlegrounds. Some of them had some issues, but according to her, they were most related to the high-end battlegrounds like Strand of the Ancient, Isle of Conquest and Battle for Wintergrasp. We don't have any of those yet released, so the biggest issues won't be there, though it would still need to be implemented.
Before we should consider looking at implementation, there should be some feedback to whenever or not, the Primal players would like cross-faction battlegrounds. You have already been using cross-faction grouping and chat, and to me, it appears that everyone gets along well with it.
- More battlegrounds
- Larger battlegrounds (team sizes)
- More players queueing for battlegrounds (if they see people in bgs, they queue up themselves, domino effect)
- Faster battleground queue
- Not Blizz-like
- Some people want to stay true to the Alliance vs Horde setting
- Could be complicated to implement
- Once implemented, it could be a possibility for TrueWoW and other realms in the future, should they feel like going for that approach
