So I dabbled a bit with the latest version (Ivana nicely appeared during a training quest ... but again noped out at some point, but as I continued an older save with new version its not a good bug report I guess anyway)
As much as I like the mod for years, and I agree with a lot of Brewmasterhals posts above about the structures of the quests - I also have some issues with the "escalation" of things in the beginning.
First there is quite some confusion for me, so much talking, Bellamy "trains" my char, his buddy, then its to Pike, more "training", suddenly animal training, but instead of some "normal" animals and then gradually demand more from the slaves you start with Falmer and Trolls, bears and werewolves.
Giving players "choices" is always a nice sentiment, but especially at the start - the story should be linear. Main char gets enslaved. antagonists get introduced. Your char gets a taste of things to come - sex training. Basic one, with men, maybe anal, and group stuff. And then build it from there. With training stages also maybe unlocking new tasks.
For example I can have a Belethor-Dogfucking quests before my char even had training in dog fucking, which feels a bit weird.
Choices - also in regards to content, or how far you want the content to go, might be cool. Again, training: If you behave nice and submissive, you might avoid or shorten the animal sex training, or even skip it? Same with the (to me extremely no turning on devices quests for example, which I welcome the cheat function for - but maybe allow the player to somehow tailor this to their own preferences. Yes, slaves have to agency/will etc - but the players are no slaves, they are the ones "telling" their chars story through their choices etc.
Overall - making everything a little more "streamlined" and clear at the start, have the slavery aspect gradually become more and more brutal and severe...and maybe shorten the training aspects a little might help.
And if you ever gat around to it: Give poor Bellamy his own hut or office at the city gates, so we do not have to endure minutes of dialogue and punishment in hte cold open while its raining.