This mod's purpose is to provide a solid base upon which the rest of WorldEditAdditions can function. Once it is complete, we will be able to mark our dependency on `worldedit` itself optional. To get to that point though will still require a significant effort in implementing enhanced versions of all existing WorldEdit commands. If you've got some free time and a great idea for a command, please do open a pull request! :D
In short, `worldeditadditions_core` is a reimplementation of a number of underlying parts of the worldedit engine. Parts of `worldeditadditions_core` are likely to look very similar to parts of WorldEdit - this is because inspiration was taken from Uberi/WorldEdit when implementing `worldeditadditions_core`.