Haha sent me my doll already

It is hard to actually think of something to calculate the 2v2s quality.
However if you just do it "like the dueling quality" you'll get the better 2v2ers high anyways. And sometimes theres a noob playing against noobs only to get high quality, but that will be solved by the better players as he'll be invited to lots of 2v2s then and lose them all probably. Free points for the better players