Yeah, until Josh implements my original feature request I suppose I will try to lightmap my entire level in Modo. However, if the LE3 editor workflow is supposed to use a Brush/Mesh hybrid system then it makes sense that both should seamlessly be able to use lightmaps generated from the LE3 editor. Although I understand that the engine is still technically in beta and Josh will add these types of features in the (hopefully not too distant) future.
It could work like the attached image maybe...