There's a reason why people's been demanding a Ren'py version. I don't know how'd that work due to Philip's gameplay later down the line.
I think changing the design completely is wrong. The game world is already there. She just needs to live. We play two MCs who are obviously of royal descent. From this perspective, a sensible castle life couldn't hurt.
Our female noble lady could, for example, could meet the female cook. And complete quests for her that are probably more of a chore: like shopping at the market in the city. This builds up a relationship as you tell us about your life and your worries, which leads to new quests. and ultimately the first lebian LI.
One of the soldiers could often meet herin town and invite her to the tavern, to corrupt her there step by step, as well as many others she might meet there. Some just want to fuck her, others have something more serious and romantic in mind.
Our "man of the house" could probably use military means over the normal events, or hunt so that the castle is supplied with meat. and during this time a female shepherd gets up close and personal with him.
These are just some quick ideas. If I had enough time, I would have many more that would fit even better. The development team should probably read up on medieval life and develop appropriate ideas. Of course, don't forget that our MCs are of noble descent. So the perspective is completely different than in the other games I mentioned before. Don't get me wrong. I don't want to have a clone of "A Peasants Quest", nor a second "A Struggle with Sin". No, it has to be a living game world that also fits “Fragile Innocense”.