What facts?
BG were always 50:50 between Horde and Alliance when it’s random vs. random. Of course some BG were a bit of, but none was extremely one-sided.
The sample size and “feeling of statistics” is the problem here. I can log in and lose 3 games in a row and suddenly “Horde is bad” because I recently lost 3 games, but if I play a whole season it’s always an almost 50% ratio.
Here is a rather good thread about it:
That never changed since classic.
And by going full premade you’ll make this alot worse for everyone. The majority of players in WoW (those that don’t pvp for rating) play 2-3 bg a day, maybe with a friend or two, but mostly alone. They want to have some fun and they win some and they lose some.
With them fighting a premade where they get farmed there is no fun and so no reason to queue another game. This is true for both factions and that’s why Blizzard tries for years to stop premades from fighting randoms.
And I already know exactly what answers I’ll get now “But what about my fun”. Sorry, but if your fun is being Real Madrid and play 6y olds on your local pitch than you definition of fun is off.