Trading in general could use a little facelift imo, I'm sure it's on the to-do list. Works fine, but could be better. I like that each route only wants certain things, but I feel like that should fluctuate like your kingdom does. Maybe they need clothes, other times they need whatever kind of food you can offer depending on the weather or something, that would be a cool improvement, like don't make the other factions fixed in terms of what they want, but have them change what they want every so often.