Well for first the latest update is free no matter if you buy or not the DLC..
All right, but apart from family tree, intriques, agent skills rework, battle loot, visual changes, some AI fixes concerning battles/sieges and army compositions, and ship leaving landing zones, what have the CA ever done for us in this update?
(All right, but apart from the sanitation, the medicine, education, wine, public order, irrigation, roads, the fresh-water system, and public health, what have the Romans ever done for us? MP - Life of Brian
)
And many of your listed "problems" are not problems at all at least for me.
-Sparta is not port city, unless you change whole way trades are done. It is just sideeffect of gamedesign.
-Captuiring enemy ships...why?
-Roads are implemented via main building chain in region/province with other techs/buildings boosting the effect without dedicated building. Whatīs problem with that?
-What is up with sapping? that is usually slow process for long term siege not wall assaults like we have here...Or you want to change torches for explosives?