That's some impressive reworking you're doing with that head. I think in a way too, your challenges with this rework are probably hitting on some of the challenges when Yulli did the original sculpt. I don't know what Yulli can do with very expressive sculpts and time, but I can't help thinking that part of the likeness issues on the first head could have come from trying to go more expressive with the head than most 1/6 figures, it seems like a dangerous ground where you run into challenges of trying to be accurrate and the fine line of good looking and not, I think the wrinkling and some of the distortion of the face on the v1 went a bit too extreme. I also think when you go that route without and specific reference imagery to go on, you can lose likeness because you're guessing what that person's face would do if they made the face you're trying to put them in. I've run into it just trying to draw people and make up an expression on their face that's not in any source image I can go by, you take an educated guess and it doesn't always work out.