....I know. I SAID I didn't have a screenshot of the truly egregious. The screenshot I posted happened to be what I could find to illustrate that this issue was happening in Endwalker, too. I didn't happen to sit around obsessively taking screenshots of all the examples of terrible ARR to Endwalker lighting, why in the world would I have wasted my time doing that? I surely hope you do see the only point I was trying to illustrate by posting that: That this issue is not new to Dawntrail.
Regarding hair, yeah, mine starts glowing too in strong light. It's weird and not ideal. Overall, I like what they've done with hair and making it sleek and shiny, but it came at a certain cost for sure.
Yeah, this screenie is hardly the worst I had seen. I just...well, like I said, hadn't sat around taking screenshots of (mostly ARR's) atrocious lighting. It was simply a given. It's certainly going to still be a problem. It's not something they can fix without doing something truly insane. "Solid objects with janky lighting" is absolutely the goal for instances where this particular issue rears its head. But you'll always be able to find locations and whatnot that make the inside of your character's mouth glow. They can't stop it, just make it so it doesn't happen as often (or as obviously) by not using as harsh of lights.
Once you know what to look for, though, you'll be able to find this phenomenon everywhere in all kinds of old screenshots and new environments. Mostly I think they've mitigated it because they've fixed some of the really terrible ARR lighting and I can't go to the places where I noticed it being excessively obvious and replicate the old results. I wish I had a screenshot of what I am thinking of in the Gold Saucer, it was so strong. Now the effect is still there, but it's softer to my eyes.
In any event, they can't eradicate it. That's only possible with truly ridiculous performance cost.