Sorry, but i can't see your point here, nor do i think we've need even more female charakters. Especially due to the fact, that a lot of charekters (both, male and female) yet still lacking an ongoing development.
So i do really not understand, how this argues against what i've said previous.
With your first sentence i think you are missing the point. How many female characters does the game need is irrelevant. As long as Nomo is the artist, and as long as new characters are introduced there will always be female ones among them, because that's what Nomo likes to draw. And since we slowly, very slowly started to explore the human regions, we will have new NPCs. And 2+2 together from there.
And you are right, very few of the current NPCs have any significant development and i also agree that they should get a bit more role in the story. But this brings us to a related issue. When the story of Ylva and Kia was released, even on this forum there were dozens of pages filled with people expressing opinions like "nobody cares" "focus on Sabia, maybe Neve, but nobody else" etc. And if that kind of feedback is representative of what Hreinn has heard, then it makes sense for them to minimize the roles and development of NPCs.
Now, personally i think that the main problem with that story arc was how much space Ylva and Kia took in one chunk, instead of constant smaller dozes like Neve or Maply, so the problem was about the presentation and not the characters themselves, but that is definitely not the feedback that was given by the majority.