https://deepmind.com/research/alphago/alphago-games-english/
(analysis by Gu Li and Zhou Ruiyang, two top pros; standard komi)
I'm a mere 1 dan, but I fail to see this marked "difference in normality".
What specifically looks "much less human" to you in these newer games?
In this games described here, the floating reduction of the wall looks very odd to me: http://lifein19x19.com/forum/viewtopic.php?f=15&t=13929&p=21.... I also thought the first game against kiss88 featured a lot of very unorthodox moves: the double tenuki in the top right and the shoulder hit against the 44 + knight's move in the lower left especially seemed novel to me. The two space extension from the 34 point is also uncommon, but less surprising.
Another move that didn't seem familiar to me was the shoulder hit and large knight's reduction in the lower right, but that may just be a tactical variation that's unfamiliar.
P.S. I'm only 3k AGA, 4k OGS, so take my personal opinion with a grain of salt! I do think I have a decent feeling for what other people are thinking. Ke Jie made a comment about no human having scratched the surface of go.
But the question was whether these Master games look less human than the previously published self-play games by AlphaGo. And I just don't see it.
The first and third self-play games in particular look crazier (to me) than anything I've seen in this Master collection.
But again, just a measly 1d amateur commenting on unworldly 9p vs ?11?p battles :) People at my level can barely glimpse the tip of the iceberg.
It would be very interesting to have pro-players comment on published records of alphago self-play.
Maybe alphago has discovered a new balance between black and white (that is a new optimal value of the komi) but when playing with the human defined of the value of the komi its optimal style is also different than what it would be otherwise.