I'm tired of the "who's the minority" issue that has been popping up, and I have a solution.
Riot needs to take things like this to the players in the client, with incentives. They need to have a pop-up that tells them if the player if they answer a few questions, and no matter how they answer, they will get, for example, one chest and key for free. The results of these questionnaires should then be published for public viewing. This will show clear statistics with the least bias possible.
They have had this done before(the pop-ups in client), but not with real incentives, and not for questions as sensitive as the DQ debate.