Well, presumably, they had an American sculptor do the damage because WB was willing to let a product made but didn't want the reference images out to be leaked onto the net so they told HT send the Eckhart head to us and we'll have one of our people do it. In that scenario, there's little reason for HT to think that WB wouldn't do it in a fully accurrate manner, so when they get it back, they're left to assume it's good to go and procede with production. Given the time between TF's debut and shipping, he had to have been in early production just around the movie's release, so by the time we got our reference images to them, the most they could do is ammend the paint apps a bit, and the paint apps reflect the reference images mixed with the sculpt. The lack of more flesh is because we didn't have quality screens showing the full head, if we'd had that and sent it to them, they may have done more.
I think Two-Face wasn't rushed, but fell victim to circumstances HT couldn't have forseen. Between the encompassing nature of this figure and sales, HT won't redo this figure new and improved so this is it, this Hot Toys or Medicom are your options for a 1/6 movie Two-Face. Really, for the minor nits with the figure, all in all it's so cool to have him and the figure embodies Two-Face even if not catching every last detail.
I genuinely endorse buying it if you liked Two-Face played by Eckhart.