I played Iron Banner all last week and over the weekend, and the lag issues were mostly better (well done on that, btw). Monday night starting at around 8:30 EST, I played several games and saw the most lag I'd seen during the tournament, and more than I had usually seen in Crucible since November. It wasn't just me; my whole fireteam experienced it for the same opponents. We reported the worst connections in-game, if that helps. FWIW, my connection was almost always in the green. It only seemed to drop down to yellow or red when that happened for every player in-game at the same time. Not sure what was going on with the servers and their little packets on Monday, but whatever it was, it had a pretty bad effect on gameplay. Hope this helps you guys debug. Cheers!