It’d be a shame to dwell and nitpick over the hair seam when everything else so really outstanding. It does stand out a lot here though and wasn’t part of the prototype design but hopefully it’ll be similar to Theoden where it’s not really noticeable in person. However, I think Theoden’s hair seem has the advantage of utilising the centre parting of his hair and keeping the seam lines more consistent with the actual directional flow or the hair in order to integrate it better- whereas here it’s just a straight horizontal cut.