I think the problem with QM is that the changes are never as Blizzard advertises them.

I have yet to get consistently good matches according to their changes. When Blizzard implements a tradeoff in QM matchmaking, it works sometimes when it should be working every time. The inconsistency just decreases the QM quality further everytime they doctor with it.

And all i fucking want from QM is MIRRORED ROLES. Im so fucking sick and tired of seeing 2 tanks vs 1 bruiser, 3 traditional assassins vs 3 "specialists", 2 healers vs 1 support character, etc.

But they would actually have to put some thought into improving the roles / tag system for their heroes for that, so lets just frankenstein the shit out of the matchmaker instead.

The worst part about this is that most of the time the team compositions could be easily fixed, by swapping one or two players in each team.