I have played on a vanilla server, yeah that's right, not all the bosses worked properly, the best guilds still stacked rogues, warriors and mages, the lower teir guild guilds that had problems clearing everything regularly let people play the spec they wanted to. And Boomkins still went OOM in the first minute of a fight and were at the bottom of meters....lastly as other people said hunter started out good but did not scale worth a damn and were brought cause they had a job to do. Guess what min/maxing happened. Will people cater and work around a less optimal raid group yes because millennials think that everyone should have a spot......guess what there will be no progression guild on a vanilla server that has druids, priest or paladins doing anything but healing(well the one bad healer may end up out of combat resing), stacks hunters or warlocks, uses non warrior tanks, or any thing else that is non cookie cutter.......