"In my Version of the Alien life cycle, the infestation of the colony would proceed like this:
1. Russ Jorden attacked, they radio for rescue.
2. Rescue party investigates ship...seveal members facehugged...brought back to base for treatment.
3. Several "chestbursters" free themselves from hosts, escape into ducting, begin to grow.
4. Extrapolating from entomology (ants, termites, etc.), an immature female, one of the first to emerge from hosts, grows to become a new queen, while males become drones or warriors. Subsequent female larvae remain dormant or are killed by males...or biochemically sense that that a queen exists and change into males to limit waste. The Queen locates a nesting spot (the warmth of the atmosphere station heat exchanger level being perfect for egg incubation) and becomes sedentary. She is then tended by the males as her abdomen swells into a distended egg sac. The drones and warriors also secrete a resionous building material to line the structure, creating niches in which they may lie dormant when food supplies and/or hosts for further reproduction become depleted. (i.e. when all the colonists are used up). They are discovered in this condition by the troopers, but quickly emerge when the new hosts present themselves. "
- James Cameron, 1986. The closest you'll get to an 'official' version of events at the colony. Nowt about barfing.
That makes sense. pretty offiicial and no egg morphing nor barfing. Yet it does seem that james camerson supports the molting into a queen aspect. Then again, this was before alien 3 or the queen facehugger(only in the special edition) so how could he have known about that?
The idea that queens were born as chestbursters hadn't yet emerged, just as the queen idea hadn't emerged yet in alien, but afterwards, it is still canon. Therefore the queen molting, because it contradicts subsequent films regarding queen creation, it can be regarded non-canon or at the very least, speculative at best.