The map is a lot more useful now... Maybe it was there before, but I don't recall seeing it, on the system view of any planet you can see it's import/exports. Makes figuring out where to source goods much more accessible. Also, in a port's commodity market, you can see where they import/export goods from/to.
Still trying to find a port that sells a bigger cargo hold. The game seems to be coming together now...not knowing what to do has me exploring just to see what's around, which feels kind of right. I'm also in an area of space where fish are sacred and illegal to be used as food, though most of the missions are asking me to find fish.