Alienation, that all really depends solely upon opinion and personal theory.
We have no idea what that egg made by that drone in Alien held. It could have been a super facehugger, it could have been a regular facehugger.
Likewise, we don't know if drones can transform into queens or not.
I personally favor the concept of a drone advancing to the state of a queen on its own, and the eggs it mutates from other organisms to be typical facehuggers, as this is efficient on both a genetic and biological level. It's easier to take a complex organism and make it into an even more advanced one than to take a lesser creature of a different species, devolve it into basics, and then grow the most advanced creature from there.