Looks like Miller has evolved beyond the Bruce Spence/Hugh Keays-Byrne school of casting the same actor to play two different roles in the franchise, and graduated into casting the same actor to play two roles in the same film.
I don't think anyone had any doubts about authenticity to the franchise. To be authentic just means "facehugger- check, ova morph-check, chestburster-check, xenomorph- check" and its AVP all over again just with less of anything new. I think the only way we could at least be acknowledging is "new and improved- checked" which speaks a whole lot more than ...."xenomorphs all over again routinely"
Imagine if the main character uses the save station, gets killed later in the movie, then reappears back at the save station again and is like, "shit, I have to do all this again?!"