As far as content, Dominions is miles ahead of most titles. But for graphical, UI, unit management improvements (etc.) I think there's a lot of room for improvement. I would like to be able to recruit from the F1 screen, sort the F1 screen by the column headers, etc.
On the one hand, Dominions is like a fun little puzzle where after playing for 8 months someone tells you that you can press "N" it's the most amazing thing since sliced bread, but it's definitely a daunting and translucent experience.
It's so rare that you actually want a game sequel to be the same thing but with a little corporate polish.