I've used the first version of Elementerra to generate maps for FE and it does work though it does not place Wildlands. I'm still playing with adding them in the Map Editor. There is a stamp for them but I'm not sure the stamps do everything needed for them. I'll let you know.
My question is, did Cephalo ever release the source for the Elementerra map generator? I'd like to make a few tweaks to it.