Regarding the Queen it appears the sounds are there in a kind of Vague way, that in no way should we assume they are a QUEEN but then also there is NO-WAY we can dismiss the possibility.
The comment by one of the Game Produces concludes the idea was there, and i think the way they handled it was the best way to go... Because if it was too on the nose then indeed some fans would EXPECT a confrontation....
Leaving it the way it was, means that Fans can debate the existence of a Queen on the Station and so they can Gauge Fans Reactions to determine that IF they produce a Sequel it would be wise to introduce a Queen or leave it out.
Sometimes somethings are best left UNANSWERED and thus left to Imagination/Interpretation.