6v6 -> 5v5 made the gameplay MUCH better. The new heroes weren't disappointing at all, the game seemed like it was going in a good direction. I disagree on your last two points, and the first one is not relevant to what I said, as that was a major improvement to Overwatch. Too many barriers and abilities on the field in 6v6, and the switch to 5v5 immediately made the game more rewarding and fun.