There are some good ideas in there.
A game editor inside the game most likely isn't going to happen. I could set up a converter to handle maps made by an outside tool, but that's very low priority right now.
Tower range overlays are a good idea.
Olive trees for happiness would make sense. But I think Bronze Age is ok for happiness sources now.
A northern world type could be neat. Might make for a good small update in winter, a thematic holidays update.
2nd idea post
If you are interested of more world generation features/types you can try Anatolia type: "generate oceans near the borders of world and belts of hilly biome in the middle most of the land is desert or savanna no marsh/forests and rarely grapes/fertilized(?) soil", Balkan type: "lushy green forests/coasts/mountains(uncommon) commonly grapes" Europe type: (because of europe being so big and i selected only part of it the name of the world generation may change. locations: austria, north italy, swiss, south germany, slovenia, and most importantly for this type is french) "lot of grapes, commonly forests, commonly rivers, uncommonly coasts, anything else is normal" Archipelago type: (suppose to resemble the greece archipelago) "small islands with small sea between them, hard to find resources like tin copper or limestone, beside that anything else is normal".
