A lot of people slowly realize that Classic was not the game of their memories, but a completely different one.
I saw so many complains about basic Vanilla features that we love and wanted back, that I am quite sure it will never stop. With the BG´s coming, there will be a huge uproar among people because of Queue times, because of premades, because of Rank 14 campers, bots in AV…
The biggest uproar will surely happen with AQ, when a streamer guild opens the gates and takes the mount. I see big fury and anger coming, no matter if such a mount is totally worthless in the end.
Worst btw. is LFG. People trashed retail for having an LFG, forgetting about Classics LFG that did exist and now they all use that addon which automates grouping, as it´s too hard by chat.
It´s been quite rare, that a premade did farm GY´s. During my Rank 14 days, I clearly kicked everyone out, who did that.
Sure, some will do it, but it´s more likely in pug vs. pug.
I agree though, that there will be people leaving BG´s if they see a premade, as they are so demoralized, that they don´t want to give free HK´s. Which is a shame, actually, as no premade is unbeatable.
Some of my biggest wins as a solo Q, were against a premade. But it takes leadership qualities and people that trust you, which is unlikely in a cross realm system.
For me, the best pvp in WOW I had in Classic pre 1.12. I look a bit worried about the BG´s implementation, as I know how “unfair” 1.12. pvp was for pugs. But people wanted this, so they have to live with it now. Safest bet is to just queue AV 24/7, solo Q get´s the highest honor there, playing WSG or AB solo is not worth it, sadly.