I believe I can speak freely about this, since it was directly released and mentioned, so here are my thoughts. *grins*
There is of course a range of facial features and morphing that can be chosen from, but I do somewhat agree that the face seems mildly unnatural. This isn't a bad thing, per se. The Ilvari are, according to HH info, a non-native race from another world entirely. So often we find "elf" style characters portrayed as stereotypically symmetrical and "beautiful" in many ways. I have no clue if it was intended, but I feel the model's mildly surreal look, just a smidge too close to perfect to make you wholly believe it's real, might be a great way to differentiate the race by emphasizing the very qualities we associate with "elves" to the point where they start slipping into a strange area beyond our comfort zone.
Of course, you'd have to ask the art team for actual reasoning on such matters, but for myself, there's definately something about the model worthy of further discussion, and I find it to be subtle and not entirely easy to pin down to one or two factors alone.
~Dune~