Extend //setbiome to set it for all layers instead of creating 3d biome

So recently i tried to change some biomes around and had huge problems due to the new 3d biomes posibility.
Problem was i first started and only set the biome for 2 layers and then i later wonder what happend and did another 1 layer until i realized i had to //expand vert everytime

There should therefor be any kind of solution or extension like -ev for the command so it automativly applies to the whole amount of layers like the old version did.