It's a great big weird thing, yeah. I want to see strong female characters, but I don't want to see what is essentially a guy as a girl because the story is a sausagefest and needs girls to balance it out. Being female should be a part of their character, and if gender isn't that important to the character knowing why they are like that grants a great deal of strength to them.
This is true. Part of my response probably has to do with, "Wait, there's a woman in a game called "Space Marine" who isn't wearing a bikini (chainmail or otherwise), captured by the BBEG and whose rescue (at any cost) is the driving plot point, or demurely waiting at home for the hero to return? That's pretty surprising!" I also don't think I'd be as happy with the result in a context that
wasn't a grimdark warfest, where it's readily apparent (at least to me, it might be less intuitive to others) why her gender isn't that important to her. A standard JRPG, for instance, would have a different bar, especially if there's any romantic subplot whatsoever with any of the other characters.
I guess what I'm saying is, the trend of "women who are just men, but without the penises" is irritating, and maybe it was the thinking process that resulted in the character, but if that's the case they stumbled into one of the situations where it actually works really well. All of that deserves to be struck through, though, if there's ever a scene designed to make you go, "Oh, wow, the
woman saved the hero! What a step for gender equality!", for reasons that have already been addressed a couple of times. Or if there are scenes that play up the male characters' sexuality, leaving hers noticeably absent.