All you need to do is change a little code.
Since you can't join 8 in a group for WZ, what they do is get 2 teams and join at the same time, often enough they get a full 8. That is bad enough. Now it is true that premade doesn't mean anything in reality..good play is good and bad is bad. I have been in pugs that have beaten premades. But, there is an advantage for premades, VOIP and they set up the groups for best balance..and often it seems they hit way harder than they should, miraculously have full resolve bars at all times, run super fast...etc...all in all it ruins the fun. Most people are scared of premades so immediately it affects game play for the worse.
BIO...all you have to do is make WZ solo queue..that is it...you already have RANKED WZ, use that for premade and join as group...it just ins't any fun getting bowled by premade groups in a solo queue WZ.