Yea I think you are right about the training data. So that would be more impressive. I still would like to see a team dedicate some time to it, but that's really not in the interest of a pro team. Also the things that affect real tournaments like drafting would be really interesting to see some day also as that is a huge part and considered a more cerebral aspect of the game.
Those are evaluation matches, they don't feed into the training data.
> The bots had a pretty specific playstyle, and if pros had dedicated time to beating them I think there would be different results.
Well, the pros could have joined the open games too, I don't know if any did.