I don't disagree they neglected having more "submissive" content for Sabia early on, but I disagree that they needed to sacrifice character consistency to make a good porn game, I think they just needed to organize and compartmentalize it better.I would say you are right, but when you play the game in its current state, even with the rape scene at the start in mind, you can see how after the trial, the submissive Sabia became an afterthought or... not exactly an afterthought but she was less in the spotlight than the balanced one and the dominant one. If my memory serves me well, you can be the submissive one later on with the feast if you choose one of the captains but you cannot whore Sabia around and it feels quiet limited.
But again, I'm not sure and I understand this is quiet the difficult part if you feel character's consistency is truly important in a smut game. I think this is a mistake though, a smut game or a smut story, if you want it to be of quality (porn side) must take liberties and sometimes bend a little bit the characters or facilitate the sex. In the same way, porn illustrations are always with "fake" lightning because this is what is sexy and arousing. Two different goals require different artistic tools/effects.
The main issue submissive content brought to the story is that way too quickly it stopped being an useful thing for Sabia, she needed to care about her reputation in the orc camp way too early so slutting around would do more harm than good, and the orc leaders were all written as actually very smart and reasonable so they couldn't be easily manipulated by Sabia letting them have their way with her.
They could have probably reworked some of the early content so Sabia wouldn't rise to being basically a sub-captain within the first 3 patches, but alternatively, I always felt that the best solution would be to have Sabia have submissive content outside the orc camp, if we could leave earlier and start exploring the surrounding tribes and towns, Sabia wouldn't really have to worry about her reputation, in the human towns she'd probably be mostly spying since she had to keep her identity a secret, so she could slut around for money or information; and with surrounding tribes, bandits, and wild beasts, it is not like anyone had to know who she was, she could play the part of just a lost human peasant and use that to acquire intel, find rare materials, feed false information, etc.
This seems to be kind of what they started doing once it became possible to leave the camp, but with how slow the updates are, it is kind of just too little too late.