Nice idea, however you get a special level 5 piraeus port as athens. I like the idea behind that since its great for roleplaying - you rebuild the glory of athens as a mediterranean power and as a testament to that you recreate the mighty athenian port. Still, if somebody likes to have it right of the bat then it's a good submod to have around. Just wondering, have you incorporated all the features of other major ports such as garrisons for all culture types, ability to build supply ships etc? Additionally, since you have the port from the start, i feel its only logical to remove the speical level 5 athenian port.
Cheers!