The game itself is very good gameplay wise, but my biggest negative comes from AI art. The portraits and such are ugly, yeah. But the biggest thing is the research screen.
In the original game, the research screen was pretty good, and you could determine what does what at a glance by looking at the thumbnails. The new AI thumbnails are generic and it is very difficult to find the tech you're looking for at a glance. You can spend minutes looking through the tech tree to find that one tech, while in the old game it would only take seconds.
Such a shame to because everything else is so well done.