I'm glad you made this thread. I've been thinking about how best to bring this up. I'm a major Thancred enjoyer so I am probably too sensitive to the changes, but I think they are noticeable. I do like the idea of making 5.0--Thancred look a little older. I think that is a good idea that matches the story. However, I think the change from ARR--SHB+ is too drastic now. In some lighting and at some angles, 7.0 Thancred looks alright, but at times he looks really different. Here is a comparison taken from a cutscene in an SHB questline ("Dirty Jobs" I think was the title or close to it).
Click for full version of pic
This side-by side makes the differences very obvious. His mouth just does not express in the same way any more.
Another comparison (Endwalker opening cutscene) where he is facing the camera more directly:
Click for full version of pic
If I had to list the most serious issues:
1) mouth
2) skin texture
3) eyes
4) cheeks
I think the skin texture issue is a problem for most male midlander right now. It creates this blotchy/acne like appearance that wasn't there before.
Do we have to report these things as bugs to hope for change?