All it is, is people claiming, without any real proof, that the updated images "look like AI".
There's no real proof of them using AI for the CG updates, just people not liking / wanting the CG updates. Claiming something is AI art is pretty much the modern version of claiming art is traced without showing what it was traced from.
Note that the hands / feet looking "wrong" isn't a guarantee that it's AI, just one indicator. Many artists (including professional artists) are terrible at drawing hands / feet already.