The trees and vegetation of the new Mediterranean biome are one of my favorite decorations but not being able to use them in other biomes saddens me. My suggestion is if in a future update you could place each and every one of the trees and vegetations from different biomes in one, just as you can mix all the buildings and decorations of the eras, I think the same could be done with the vegetation of different biomes even if it could only be done in sandbox mode, please consider frontier, you will surely make a lot of sandbox players happy