Yeah, even isolated the old model is desaturated and weird to me and the hairstyle was way too messy/haphazard for Tanya, especially with the elegant vibe they gave her costume this time out.
I agree it looks like the skin color problems were largely lighting issues, but that means the base skin color should have been more red/brown rather than yellow/gold (which it is now).
I'm very happy with the update. The eyes I would've kept variation-specific to Pyromancer, personally, but I really love how they look in-fight, glowing under her bangs.