This is not a fight you Boys Who Cried Futa will EVER fucking win. I genuinely don't know how many times the stats about how futa makes up 2/5ths or a quarter(at best) the amount of total content in this fucking game need to be brought up before you guys get a clue.
In that same recent update you have repeatable content where you bang a set of twins, both female, after completing a quest(said quest you are with 2 other regular females as well. And you get a scene with them too). Ylvid, a regular female orc, got a pregnancy expansion(which includes a new sex scene involving Hertha, another regualr female orc). And Drifa, another regular female, got new scene.
But nah, because there are 2 whole scenes involving a futa, all that other shit just doesn't exists despite being how much more content there is in comparison.
Jesus fucking Christ.
I mean, sure, if we gloss over the numbers then you might have a point, until you actually take a look at the volume of content introduced, and not just the NPC count. Regardless of the count they always have more net content volume, as the stock male/female NPCs are a lot of the time barren or incomplete content-wise.
* When it comes to character content, last public update (8.1) included:
1) Hjorr (dom futa) scene
2) Cuck content where minotaurs fuck Cait
3) Hellhound futafication tweaks
4) Ylvid content you mentioned but conveniently left out the part where you can have Arona pump her full of kids instead
5) Alante Futafication, which iirc has more total content than her vanilla counterpart
6) Nieves (futa) scene
7) One Drifa scene
* The public patch before that (7.45) had:
1) Atani's dickgirl guards pumping your pc full of kids
2) Content for Hana (a dickgirl) impregnating your pc
3) More hana content, only this time with Cait (again...)
4) Cait dom scene
5) 1 scene for Azzy
6) Isadora content, which includes her getting gangbanged (no clue if you can take part or if you sit in the cuck chair again)
7) Tetsuya content
* The one before that (7.42):
1) Shitty elf and leothran twins content, one of which's entire personality revolves around her dick
2) Batfolk scenes nobody cares about
3) Etheryn cock content
4) Harpy random encounter scene
5) Alice content, most of which is Evelyn (shemale) ruining her and your subby pc (iirc)
6) Male frost wyvern and male wyvern content
* 7.39
1) Nieves content
2) Nieves Cait 3some
3) Male wyvern breastfeeding
4) Nikol Cait 3some
5) Big Drifa expansion
6) Drifa Marriage
7) More Hana content
8) Even more Hana content
9) More Hana scenes
10) Hana Marriage
11) Random encounter scenes, which include Miner bad end (amazing)
And for the longest time before that it felt like we got at least one Kalysea-related piece of content per update, the NPC with arguably the most content among side-NPCs.
I could go on but this should visualize the NPC count - Content disparity. You keep on bringing up the numbers without stopping to consider that maybe the fact that said disparity stems from specific futa characters getting more and more content -- the reason they're not introducing as many new ones (which they still do) as non-futa NPCs.
A lot (not all) of the "many" female NPCs introduced have little content in comparison (not considering the ones with "optional" futafication content). Male NPCs just have it bad on both ends, having both low NPC count (interesting ones especially) and low volume of content, but that's a can of worms for another discussion.
A big portion of the game's content belongs to Savin's characters, and most of them just happen to be futa content or related to it (either that or getting cucked), among other writers with the same interests (because they totally don't live in an echo chamber).
So yeah, we can't ever win this one, but not because of you waving around quantitative fallacies, but because this is just what the writers are most interested in.