It won't happen for 2 reasons
1) hardly anyone plays anymore I'd say 70% plus are all level 40 probably much higher remove them no one else would get games
2) The 40s don't want to win due to skill, They'd rather fight fights that were pretty much other as long as both sides participated before they began (free wins) They don't want to use skill to win , They want free wins , Juggernaut is the prime example, Everyone knows a really bad player could win in jugger, A jugger win means the person is just seeking free wins and not very skilled, Yet you cannot 2v2 due to juggers anymore....
I completely agree with your suggestion , And agree with OWA it should have happened long ago, To little to late now
Just telling you why it won't happen regardless of the fact it should.