In my opinion, your game shapes up to be the best h-game out there. I usually lean towards the opinion that h-devs should not focus too much on mechanics, as they're usually alone or a small team and are as such not able to deliver a game with deep mechanics in combination with a variety of h-scenes. But your team is clearly up for the challenge to make a good game, so I don't have any fears in that department. The only thing I'd like to see to be added h-wise, is bestiality, even though you already said you don't want to add it, as it would allow for some cool quests and such.
As an example, in the quest where you have to hunt down the alpha hyena, you can either just go kill it, or you could get some meat, scout for the alpha hyena, scout the hyena resting place, rub yourself in their scent, place the meat at the right place, then wait for the alpha hyena to eat enough, so it won't immediately kill you, but not too much or it will just leave, then approach it slowly while bowing to it, carefully balancing the hyena's excitement and distrust, then have it mount you and doing its thing, and then waiting for the right moment to ram a dagger into its chest, not too soon or your ploy will fail and you have to fight the hyena with lowered health and just your dagger, and not too late, or you will lose yourself, the hyena will finish inside you and you will fail to kill it. If you fail to kill it and you don't wash yourself off thoroughly, you not only have to tell the chief that you've failed, which would mean that you'd have to look for different means to talk to the minotaur, but he'll also smell the hyena stench on you, banishing you from the village.
Now that would be a quest I'd pay money for (more than I already paid that is).