The closest thing to that is Imp_General.xshad.   It's the shader that is used by default when you import models with materials.
However it does not have Rim Light,

I think that Imp_General.xshad shader dont have displacement ,bump ,mirror and  IBL textures and options .

also can this shader support layering of shaders or mix textures ?

In Aximmetry it would be very inefficient to use such a giant shader.
Instead please always choose the minimal one that fits your current need.

The  Mix_*  shaders can mix two layers of textures controlled by a third texture named Mix Map that determines the mixing.
If you need a mix of more texture you have to create your own shader based on the existing ones.

I think if the users can turn off or on shader options is more efficient than changing shaders when you need some specific  feature.

Also i think this will help users that came from other 3d softwares and have working with these software material System like C4D or Max ,ETC

We believe that the benefit of such tool would not be that big, but we will consider it. Thank you.