The improvement for protecting your trade routes despite loss of individual freighter is not working as advertised. The Krynn set up shop on my important trade routes and shut them all down, crippling my economy, despite the extra expense I paid to quick buy the improvement before they could do so.

Other than that, I'm liking the Korx. Not too dramaticly different or unique, yet they are very good at making a buck! I never got a chance to try the mercenary stuff, though... probably my biggest mistake, since all the big players were at war thanks to the Drath.