It would be neat if there were faction-specific cargos. Maybe one or two for subfactions, more for nations. Like serco having bionic implants, robot servants, etc, and these being worth a lot more everywhere outside of serco space, but worth a ton in the furthest systems and especially at, say, biocom. Itani could have prayer wheels, robes, rice, that sort of thing :). And UIT might have special manufacturing equipment. And each corporation might have their own products that they manufacture and sell. TPG having solid state spaceship parts, etc. Just so that we have more to trade and more interesting things to cart halfway across the galaxy :)

...and grey has illegal goods.

really, there needs to be incentives to go to grey. today you can get richer elsewhere, apart from one special route. :-(

It would be nice if runs to pirate territory gave you extra cash or xp. It is, after all, a more risky route to trade by, especially around Sedina B-8. Of course, that adds to the fun of trading which is why I go through there as often as possible, but I do not count fun as a measurable reward, except where M&Ms "Fun Size" packs are concerned, and the devs haven't sent me even one of those :)

I tihnk it does that already. If a trade mission brings you into the territory of a different faction or gray space the reward is higher.

The best missions are ones where you have to cross multiple territories :D