World Builder Problems

I just got Gathering Storm and am trying to make some maps in world builder but I keep having a lot of issues with it. If anyone can help me with any of the following issues it would be greatly appreciated. They are as follows:

1) World builder won't automatically add city states to a generated map, only regular civs. Is there any way to make it so that it'll add the city states automatically so that I don't have to spend an hour doing it myself?

2) If I change the civs that world builder automatically chooses (such as changing Macedon to Korea) and then reload the map, I can't plot anything at all. The entire 'plot' tab completely malfunctions and won't let me do anything else upon reloading a map.

3) I have tried using a modder's 'earth map' to make some alterations to but if I try to change anything the game crashes when I try to load the map to play it.

4) Is there any way to start a game, save it, and then load that saved game into world builder? I would like to do this with one of the larger maps from the 'Yet (not) another Maps Pack' mod.

Greatly in need of help with any of these issues. Thanks.

 

I have had the same issues. I'm hoping the World Builder gets some love eventually - or a Civ 6 version of the IGE mod would be awesome.