Nice job slowing the action down. The aliens are a cool addition, but they don't have to dodge all the asteroids. Many pass right through. With the threat that they represent, I wish there was some benefit to killing them other than they're not shooting at you any more. Feels like they should drop something 100% of the time.
I like the stats that the ports now show you on your trades, very helpful for knowing if you're selling at a profit. IMO though just like in TW, if a port is buying something, it should always be at a profit (even if small) to what the player buys it for from an opposite port.