As for the Pillar Ball model I just quickly made it in 3DS Max without caring about unwrapping UVS. That's why you get that awful stretch. I'll be working on having each texture has it's seperate sampler and each shader has it's own constant buffers.
As now it's every mesh has it's own constant buffers. Not every constant buffer is treated equally - bill board shouldn't have the static meshes constant buffer. Foliage shouldn't have the same constant buffer as billboard even know it's the billboard swaying inside the wind direction.
That's it for now.