I unfortunately don't have the time to look at the papers in detail (I could totally see how a lot of what I observed could happen even without intentional misc

I unfortunately don't have the time to look at the papers in detail (I could totally see how a lot of what I observed could happen even without intentional misclicks so I do take that back), but I want to point out that January 2019 Alphastar (in exhibition matches against TLO and MaNa) is significantly worse than Fall 2019 Alphastar. Alphastar changed very markedly between those time periods. If you look at an Alphastar Protoss game from the latter half of 2019, it's not relying on cheap tricks to win (such as the impossible stalker micro). Nothing it's doing leaps out as superhuman. Instead it just grinds down its opponent through a superior sense of timing and macro strategy. The two games I linked against Serral it wins by punishing when Serral overextends his reach or by altering its unit composition to better fit what Serral throws at it, rather than some ungodly micro. Nothing it's doing there couldn't be done by a human. In fact I would say in most of the battles, Serral's micro was better than Alphastar's. Now it's also worth pointing out that Serral is playing on an unfamiliar computer, rather than his own, so there's a bit of a handicap going on and even Alphastar Protoss will still lose to humans, so it's not superhuman, but it's definitely an elite player and its play style is very difficult to distinguish from that of an elite player.