Just completed a full campaign as USA vs. Athena. Here are my nits:
1. After conquering some cities in Louisiana, I hit F6 to start building industry down there. The next turn when I go back to F6, the state is always "empty"--none of the 1, 2, or 3 factory icons I put there the turn before remain. I never saw anything actually built in Louisiana. I did not experience disappearing factory icons on F6 in any other state.
2. Athena seemed unduly focused on Forts Monroe and Pickens. Kept a rather large force besieging Pickens turn after turn even though (1) Rome was burning elsewhere, (2) the besiegers never made a breach, and (3) the besiegers never assaulted.
3. Had quite a lot of font/textual overruns on various screens.
4. The music randomizer is very much not random. I have dozens of songs loaded, but kept hearing the same few over and over.
But it was quite enjoyable nonetheless!