I'm getting huge amounts of Xp for trading cargo around without missions, medical supplies are getting me 20Xp each, and they arent even on the "demanded items list" under hte news tab.

Did someone alter a constant somewhere, or is this intentional?
If it's intentional, i think its a bad idea, if not, its a bug, which is why its here.

You generally get XP when you make a profit

I like the new system. The old one maxed out at +2xp per unit sold. This one goes from 4xp to 24xp. Nice.

the Xp is insane tho, there is absolutely no reason to do a mission anymore. I can get almost 1k Xp for a fully loaded centaur over 1 jump, the missions dont give me more than 500 for much longer runs. and the cargo i have to take for the mission is almost always a commonly traded ore.

There is still one very good reason to do Trade missions Spellcast, and that's faction standing, especially with the UIT companies.