Here's what I whipped up.
Link: Download
Unzip into gamefolder/data/worlds
So basically I flattened some areas and put some roads down, removed all prefabs and made the entire biome forest... the coordinates are as follows:
Atlanta: -1616,124,-1888
Quarry: 269,71,-1858
Woodbury: 629,124,547
Prison: 1257,124,62
Hilltop: -175,147,1378
Alexandra: -748,124,1689
Negan's Compound: -1214,124,1881
Quarry:
Woodbury:
Alexandria:
Hilltop:
Feel free to let me know what else you'd like; biome changes, mountains, etc... the layout is pretty similar to the one I did in mspaint above. =)