User blog comment:SomeoneYouUsedToKnow/.-.-.-.-.-./@comment-25396609-20171214003642/@comment-80.192.6.40-20171214071512

She did mention knowing he was a scientist, which indicates she knew about him before this (since there's no indication he's a scientist visually). This would support Phantom's idea of Watts being better known prior to his current state. The fact that she mentions he's a "disgraced" scientist suggests what happened to him was a rather public affair too. The lack of acknowledgment about him prior to introduction could just be explained by writing choice by M&K. At least that's what I concluded anyway.

I agree otherwise there's no way to tell due to lack of categorisable ethnic groups in Remnant (though cultural groups are a thing at least), which also doesn't make sense either given as you notem, Remnant's climates combined with the fact that populations would, due to the Grimm, be more isolated then they were in human history and thus they would still develop different phenotypes. In addition, the Grimm would make migration quite hard until the modern age, so one would expect distinct ethnic groups to emerge and be notable in some respects (instead the populations are super-heterogenous and even have some things that I'm not sure are down to Semblance like Klein and Neo's eye-changing. I mean they're literally modifying a section of their body when they do that, which is a bit beyond most Semblances which tend to have external effects). It's not a big deal, it's just something that is inconsistent with actual population dynamics. Accents I can more easily forgive due to potential issues with voice acting and this just being easier.

However given all of this is a fantasy, I'll write it off.

Other thoughts:

Vernal's choker looks like a mini-belt, which is just silly. Also the show sometimes has an obsession Volume 4 - lots of characters have one or two belts wrapped around them in ways that don't really support their trousers.

The extended period of talking during the Menagerie fight kind of bothered me - they should have hit the Albains while their weapons were frozen. And yeah, Corsac is a bit on the heavy side. His head looks too small for his body.