Mercenary Mode allows players to enter unrated [battlegrounds] as a member of the opposite faction. Players are transformed into an appropriate race and fully function as an indistinguishable member of their new team. Only available when a faction is experiencing long wait times, the feature aims to reduce queue times for these types of play, while still preserving the lore experience of factional conflict.
I hate seeing my horde friends wait so long between queues, already seen a few quit over it.
This will allow better queue times, and hopefully more solo vs. solo queue BGs instead of premade vs. solo queuers.