There is growing evidence that ferroic orders and metallic transport in macromolecular solids depend on the structural ordering and dimensionality. However, it is still unclear what conditions, charge-transfer and polaronic features are required for molecular solid systems to behave the multiferroic and/or metallic state. In addition to its scientifically relevant, this is also becoming a practical interest in connecting with unusual high-Tc molecular multiferroics and even superconductors. In this talk, I will discuss materials design and transformative manufacturing of molecular crystalline solids, and promising prospects in ferroelectrics, magnets and multiferroics.