Being a native Kentuckian, I feel some shame in finally noticing that the Cumberland Gap is not represented in the game. E.K. Smith led one prong of the 1862 invasion of KY through the gap and it was an important feature fought over in the first 2 years of the war. In terms of the map, the region Lee, VA is impassable mountain terrain. This blocks the gap. The Cumberland Gap definitely needs to be open.
I also wouldn't mind to see another southern KY town represented on the map. Prestonsburg is on the map and it was ~100 people in 1860. Further west, Richmond and London were both ~750 during the Civil War. Another structure in Southern KY could represent the region better and allow for a less linear invasion route for KY. If it comes to it, replacing Prestonsburg with one on the Gap route would make more sense.
While I was looking at the census numbers, Covington KY (opposite Cincinnati) was 16,000 people in 1860. I think that definitely warrants a structure (probably size 3) as well. Lexington was only 22,000 people.
I'm not sure what you can accomplish Lodi, but unlocking Lee, VA is a must. The other stuff might fall under the "legacy patch" issue.