The new idea's actually pretty good, I like it. Plus, it doesn't at all harm the reproductive cycle established in previous films.
Queens are born as Queens:
Well, yes, the one in Alien 3 had small arms and a vestigial crest on it. BUT, the A:R burster removed from Ripley 8 looked like an ordinary burster, despite the fact we know it molted into a Queen. It is possible therefore, that while Chet was born an ordinary Predalien, it undergoes a change of some sort when it discovers there is no queen present.
If Queens can use this method, why bother entering an egglaying stage?
Because, if there are few drones present, it would be unwise for the queen to make herself vulnerable by growing an eggsack and allowing herself to be attached to the ceiling. If there were two drones gathering hosts while the queen was stuck alone, it would be easy to kill the drones, and then the queen before she could get herself mobile. So, when a hive's in it's early stages, perhaps the queen would use a less effective method of reproduction that allows her to remain battle-ready.
But egglaying is pointless if they can use this method
Wrong! Egglaying is much more effective for impregnating on a large scale. The young queen/implant-giving alien would have to go round personally impregnating all hosts, which would be extremely slow compared to facehuggers, who are created in numbers, allowing them to impregnate more hosts far more quickly.
The idea sucks, why not just go with eggmorphing?
That's your opinion if you think that, not everybody does. At the end of the day, this idea is a lot more feasible than eggmorphing since it basically takes the function of a facehugger and transfers it to an adult alien.
As for Sil... You haven't seen the film, and often I agree with you about a lot of things, but maybe you should stop preaching your opinion like it's gospel truth and start looking at this from other points of view. Don't try to force your opinions and views on others.
Maybe we should all wait until the film is released before we pass judgement.