The appearance of Anime characters is partly due to foreign influence from the French & Americans, partly due to the idealization allowed by animation - we're getting a window into what looks attractive/interesting to the Japanese - and partly due to the need to make character designs distinct. It's really not that big of a deal, the same things are present in American animation.
For example, there are an unusually large number of square jaws in the DCAU because that is a feature we think looks strong - but maybe the Russians, who tend to have squarer jaws than Americans, are having nerdy arguments over why American cartoons look like they feature Russian men. It's a matter of perspective, and it exists mostly in our heads, not on the screen.
As for "whitewashing", that's an American perception, Japanese tend to politely laugh at people who talk about it, since from their perspective, we are actually Japanifying ourselves by making a GITS movie, not whitening them.