3rd party support
3rd party mappers according to my knowledge can be a good help for the developers .
Even before special editor is beening created I suggest some community members probably will be interested to make map from scratch .
Also devs might will like to help to the 3rd party mappers with advice .
Besides I heard it’s more easy with unreal engine , especially if the map are created in 3ds max studio .
Unfortunatelly I am not the one who can right now give good example …