LW RP Shader Graph performance on mobile

It's unclear to me if shaders from the shader graph (PBR graph) are supposed to be mobile optimized.
From what I see I would not want a PBR shader on mobile because I for example just want a simple diffuse or vertex colored material without all the extras like alpha or metallic, emission, etc.

But then I'm a bit confused because LW RP is supposed to be optimized for mobile, yet there is no way to make mobile optimized shaders?

 

Hi I have the same questions +++

 

Guys we need answer

 

Write them by hand with all the added complexity of having to manage all the passes and lighting yourself, then deal with them breaking every time Unity changes the LWRP which they do often, diff the shader code and see what's changed since there's no documentation, fix them, rinse, repeat.