Okay, I'll admit that I didn't really read all 27 pages of this topic, but I did read the topic on Alien Experience, so here's my 2 cents.
It's true that we've never really seen a Queen in the phase of establishing a hive. However, there is the one scene in A:R where it is mentioned that the Queen will start laying eggs within a few days. That means she's reproducing asexually, which is totally different from puking embryos into mouths. Of course, there's the Predator DNA to factor in- we've never seen an Alien that came from a non-terrestrial creature before. A Predator's DNA could be entirely different from that of a terrestrial creature, i.e. leading to very different results when an Alien coming from a Predator host has assimilated the Predator's DNA. Hence why it takes on a lot more host characteristics than, say, the dog-Alien (mandibles, dreads, color). A Predalien Queen utilizing a different reproduction method initially before switching to the Aliens type egg-facehugger-chestburster cycle also fits into that. Hell, maybe this is similar to how Predator's reproduce!
Just my take on it, I don't think there's too much need to get your panties in a bunch. Still, I would have preferred the egg transmutation method from the Alien DC.