The entirety of the Noveria mission is the Ice Queen. The individual aspects of the Noveria mission are facets of that archetype and not meant to convey the whole. It is a work of art. That is where my appreciation comes from. The Ice Queen was explored top to bottom and back again in that mission.
I'm finding it difficult to apply a personality archetype to a "setting" ... it would be like thinking of the stage as an actor; the stage is impersonal, it has no appreciation of the comedy or tragedy played out on it. Noveria itself doesn't care - yes it may be cold and impersonal but so's Hoth or Pluto, a planet can't be anything other than impersonal, I don't believe in Gaia.
The aloof nature of the archetype needn't be grounded in an imperious nature but, to strip it down further, simply an isolated nature. Although, that is not its only characteristic. Benezia is isolated from herself, her family, all she lived for before indoctrination. The Ice Queen, in the case of indoctrinated Benezia, is a fabrication. It isn't genuine, as you say, but for different reasons than you're stating. The isolation is from her true nature and her mind sterilized by the force of putrefaction rather than purification.
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On another note, one the small things that stands out in the companion dialogue during the Noveria mission is one of Kaidan's lines about getting snow in his boots. Which means to me he's getting cold feet dealing with the Ice Queen.
Artful applications in game design are a way to explore explicit content without resorting to gross representations.
The "isolated" part of the Ice Queen archetype is the Queen, it's the fact that she's an Ice Queen that makes her imperious, or aloof... untouchable. An African Queen, as an archetype, for instance, is something else entirely:

Perhaps fiery or passionate but still, ultimately isolated - perhaps feared.
I'm fine with your take on Benezia - but I just don't agree that, that makes her an Ice Queen... and I'm still not seeing any suppressed sexual tension (socially acceptable or not) or titillation in Noveria, the setting or story, metaphorical or otherwise. There's no explicit content being explored, just a series of pretty standard plot devices and characters which have been used time and time again and thrown into a diorama lifted straight from The Thing (John Carpenter version). The corrupt corporate exec (complete with goons), the good undercover cop, the blackmail victim; apart from the setting there's not a lot there that's not a million miles away from half a dozen James Bond films.
As for Kaiden .. heh, no idea, he's sat on the bench every game I've played (bar one)... until getting him killed off.