I don't get how you can say the eyes are too small and the jaw too large. How can you say that about a fictional being?
Um, I can't tell you.
Well, Stephen Jay Gould did have an interesting piece on that....
Your later incarnation of the Alien looks friendlier due to neotony. The former alien has a larger jaw, like a 'hybrid' might be expected to. What Irishman has clued into is a subconscious understanding that a lantern jaw and intellect aren't expected to coexist well evolutionarily speaking--even though the eating of meat increased our brains. That having been said, it allowed the human animal to retain neotony, as adults jaws expand less with age than do most other beasts.