I don't think it's overstating it too much. Even with the restrictions, the bots are still performing well above the capabilities of the vast majority of human players. The restriction on illusions and summons was also for the benefit of the players; the OpenAI team didn't want the bots to win through flawless micro skills. For point 3, even though the players didn't get to train against bots, they have the advantage of being able to learn and react accordingly. Since the bots can only learn when their models are being trained, they're trivial to beat if you use a novel technique that they haven't seen before.