I understand your concern to an extent

How inconvenient! :p

I understand your concern to an extent, but isn't there a point where you concede that people need to get their feet wet before learning how to swim? Perhaps players inexperienced with the roles of tanking or healing are giving it a try for a chance at some good rewards and or wow lower queue times. Why not see how Call to Arms changes the trends of group successes/failures and queue times over a period of time slightly longer than 48 hours? The patch has been out two days. I don't think you can adequately say your experiences since the release of 4.1 are indicative of how this feature affects Dungeon Finder groups in the long run. :)