This is garbage.
I tried some yolo queue today. I had a match where my PUG partner left or DC'd or w/e happened, before the gate even opened on the first round. The guy did not come back for the 3 rounds that I played by myself. I still lost -13 rating for it.
Why did this mode get released with that programming to begin with? Clearly if a PUG partner leaves you alone for 3 rounds, you should not lose rating for that match.