[2019] The Iron Banner last quest step "Headstrong" can still be cheesed.

The cheese still works for this, tested it last night.

For those that don't know: Once you get to the Iron Banner quest step "Headstrong", which is the last part, it requires you to win matches. Instead, all you need to do is win TWO matches in a row to start a win streak (or if you have a streak already), then start queuing for the next match, and when you see the number change from 1/12 to any other number, cancel the queue. You will now have earned progress as if you just won a match. Rinse repeat until finished.