Any Ideas on what to do next? Or any improvements?
I did work a little on cabins, No log wall textures at the moment. Just wood walls.
I already have 99% of terrain tiles, and that's it, done. I'm not going to use sprites for monsters and items. Fields and traps maybe.
I played the game and changed things I didn't like, then I looked at tileset.json and did sprites that had fg= 0. I guess you could do the same. Try to make it look consistent, same style all around. Use the same brown color for dirt and grass if you want to blend them better and avoid those grass tiles looking as discrete squares. You can define separate sprites for vertical and horizontal fences or railings, and some other terrain tiles like that.
I think you better work with people on DDA forum, they need all the help they can get and your tileset will get greater exposure. I expect tilesets will be compatible between DDA and MGS.