It’s in the spirit of preservation to uphold the integrity of the game’s gameplay.
PUG versus Premade is inherently unfair, and is acidic to the game’s integrity. It turns Battleground matches into hot garbage, where there was once some semblance of contest.
As people have begun to abuse the ability to form premade groups – which may have once been a social enterprise – to the detriment of integrity, I assert separating the queues would be of benefit; ensuring fair matches on all fronts, and a higher quality, more integral experience for everyone involved.