WoW isn’t a game arena soloq would work too well in. Others have already said it (this isn’t a moba/shooter and classes you get would be a defining factor since everyone is locked into just one), and I absolutely agree with it. People are saying “but everyone would get bad comps!!!”, however getting something like mage-mm-mw where more or less all your cc shares dr on setup-oriented specs against dh-warrior-hpriest is still a matchup heavily in favour of the latter because they can just win with pressure. Note how both the comps I picked are off-meta. Even between those you see a clear difference.