Thank you for your question~ 🌸 I'm also a huge fan of Rune Factory so I totally get you! I do want to clarify that you can do combat in IV, it would be a Try Your Best!! roll. That being said, IV is meant to be more about personal conflict and relationship-building, so crunchy combat with armor classes and to-hit dice is kind of out of the scope at the moment.
Of course, I will never say never to adding combat because one day I might get a spark of inspiration in the middle of a walk/shower and realize how to add dungeons to this game. Same goes for adding a more in-depth farming simulation aspect. There is a lot of room for IV to grow as you can see~
I hope this answer helps, don't hesitate to ask or reach out to me 💚