I'm wondering if I am imagining this: it seems that there's been a big improvement to this head type. Before, it had a very blotchy light reflection quality compared to type 1, like the surface normals were messed up. It made it a very unappealing head type when I started designing characters a couple hundred days ago, but I just was looking at it today (Jan 5, 2011) and it's looking pretty good to me.
Has there actually been a change recently? If I were to suggest an improvement, it would be to make it so the iris size relative to eye size was independent. If you try to make the eye size larger to be more on the scale of the type 1 head (more caucasian), the iris gets very large and looks inhuman (admittedly I am trying this on the alien head type / female at the moment).