Going off of what [@rezay] said, having wasteland deserts just give trade bonuses for crossing doesn't make sense. Trade is valuable because of the things that are traded, not the journey the goods take. I suppose that also goes off the other issue with the map is that there doesn't actually seem to be anything of value that is easily accessible and not in a lethal biome. And with ruins I'm assuming that they're either urban or suburban ruins which means the land they're on often as little resource value. What is an airport supposed to be able to produce on its own?

I could see the Rats and the Ogres becoming huge in trade once that does get set up (being outposts in the wasteland to resupply) but the other issue is that we'd have to rely entire on NPC to NPC or PC to NPC trade since everyone else can just follow the much easier route along the coast to trade with one another.