Hi PacWhite, thanks for the feedback and ideas!
In regards to the voxel model sizes, I am planning to just stick with 32x32 for now, however I am going to revisit this down the road (probably after I migrate to Godot 3.0) to see if I can design a better way to handle the large number of voxels. I will take a look at the bug where the Save button does not become enabled. :)
As for the Main Menu background, global properties, and script function ideas, I think these are all great ideas and should be pretty straightforward to implement. I'll see about getting these into a release in the near future.
Being able to edit Translations within the editor is something I'd like to implement, also. It will be a bit more involved than the others, but it will definitely come in a future release.
Thanks again, this feedback is very helpful! :)