Reposting this comment about DQ
> A pure solo player with rank X and a pure 5s player of the same rank don't represent the same skillset. They're vastly different experiences and don't belong on the same ladder in a competitive game. It would be similarly misguided to average out doubles and singles rankings for tennis in order to provide a unified ranking. Just like in DQ's case, this would only create an ambiguous ranking which fails to be a good indicator for either format.
>For a ladder to be valid, it has to operate under controlled conditions which are consistent for all its members. DQ adds a myriad of new variables which greatly increase the difficulty in isolating individual skill while also dramatically increasing variance and leading to a feeling of reduced individual control in outcomes (for both directions). Worst of all, many of the variables are not only unequal but also unknowable (voice communication, smurfs boosting friends, well-practiced pre-game plans and strategies etc.). Unknowable variables are especially problematic because it's impossible to perfectly compensate for their absence/presence and their influence can be wildly different from game to game.
When you can't accurately compare players of the same ranking due to potentially huge queue configuration differences, you know the ranking system is broken at its core. These are not just matchmaking or queue time issues. This is about the very legitimacy of ranked and as long as such inconsistent experiences are aggregated on the same ladder, it will always fail in this dimension. Even the best voodoo math cannot change the fact that the fundamentals directly oppose key premises of a viable ladder and such attempts will always lack transparency for laymen anyway.
As ranked is further devalued, motivation to pursue the game seriously will dampen and the primary engine behind the game's growth will eventually stall. When people no longer respect and trust the ranked system, they'll be less driven by self-improvement through streams, guides, as well as watching LCS or absorbing other LoL content.
>Forsaking ranked integrity in the hope of attracting more casuals is akin to plunging a dagger through your heart to cure high blood pressure. As the blood pressure first drops, it may seem that cardiovascular health is better but the cruel truth eventually manifests itself. Most of what makes LoL a vibrant game comes from its hardcore fans who make art, create websites, stream, preach to their friends, post on forums, etc. The casuals don't care all that much whether it's normals or ranked anyway and tend to follow the trendsetters from game to game. Even if ranked is more accessible to them, they may never become that "ideal ranked player" who buys a lot of skins and champions. It’s not worth losing the goodwill of the community and frustrating those who actually do care about ranked.
>While SQ would be ideal, Riot seems unwilling to let their customers choose which queue will live so I’ve come up with a few compromises. The first would be to simply not allow anything beyond duo queue in Platinum and above. The most vociferous opposition to DQ comes from dedicated players in these ranks and larger premades also lengthen queue times. Since it’s generally accepted that anyone can reach Gold with some effort, allowing DQ and its distortions upon the ranked system only below Platinum is an easier pill to swallow.
>Another idea would be to keep DQ but segregate out solo performance almost as if it was a separate queue. This would still be higher variance than a true SQ due to premades but at least all solo players would be exposed to the same variables over sufficient games. Unlike the current system, it would have internal validity and it also wouldn’t kill 4s like a solo ladder probably would.
Thanks SergeantScuttler!
Source Here: http://na.leagueoflegends.com/en/news/game-updates/features/rethinking-ranked-fives-and-tuning-dynamic-queue
TLDR; Even if DQ is completely balanced out and completely fair, it still sucks from an intellectual standpoint. The ranked identity is inconsistent due to the numerous ways to achieve the rank (boosted, solo, with friends, etc).