Now I shall comment on the "yellow face" issue on behalf of all Asian people
...for the most part, I didn't see it as an issue. I suspect that shifting the racial appearance of a person via make-up and prosthetic is not exactly a trivial procedure. Consider how hard it is to make just "regular" plastic surgery look good on a patient (not even trying to change racial appearance) that was good-looking in the first place. It's *real* easy to F-up the aesthetic beauty that was originally there by pure nature. It's a bold thing to try it in a movie, but I say there is still some ways to go before the science gets to the level of looking completely natural.
Now I submit that the treatment to Hugo's character was more aggressive than the other instances of race-shifting to Asian character. Maybe a click too far?...perhaps. I would offer an alternative explanation that they made it the way they did, not to demean Asians, but to convey he is a "bad guy"...a bad guy with somewhat exaggerated features, as if to be a caricature of being a bad guy. That's all I think it was, but it is easy to take Hugo's appearance the wrong way if not taking that context into account.
Look at the appearance of Tom Hank's "Dr. Goose" character. That was kind of an over-the-top caricature of a "white bad guy" from the colonial era, right? It certainly wasn't complementary to the aesthetic of a white person, but maybe we are all conditioned to accept that is what Caucasians on an old-world slave ship would look like, for some reason? I would submit that Tom Hanks looked the way he did because that character was to be presented as a "bad guy".
Every race has examples of aesthetic appearance that look like an utter train wreck (i.e., "ugly" by even the most lenient standards), that occur utterly out of nature. We should at least apply that reality check before we go-off on some racial outrage episode about something in a movie.