One thing I miss here is a way to change color pallets. For example, I need to change all voxels with a red color to blue, the best way for now is to use the fill tool and click on all regions that is needed. But if the model is complex, or have different matrix you need to hunt the voxels to click, not all voxels are visible, some are inside others...
For this kinda job I was using the magicavox. There we have a color palete and we can simple change the whole color into another and the all the voxels with that color are updated. The problem is that software does not support multiple matrix. I was trying to change the wolf color and it is not possible there because it would merge all layers.
Another thing that would be cool to have is a way to select all voxels with the same color. Maybe a double click in a voxel and all voxels with the same color are selected.
I know this sound kinda demanding, sorry. Not my intention to rush you or anything.