@Slin: Thanks for sharing your brain . I use 16 different textures for the whole scene including buildings plus few textures for vegetation. Problem with atlases is that it`s a pain to get a nice UV. But for signs and other "special" things I use atlasses, of course. Special textures are as "summorized" as possible.
@Germanunkol: Texturing in Blender is still faster and more exact than texturing WED blocklevels.