A shader mode that is compatible with the 4.6 UI system

We've been looking into creating shaders that are compatible with the new 4.6 UI. By that I mean putting the shader on a material, and then putting the material in an Image component. Turns out, straight out of the box SF shaders don't even draw, but there's a limited amount of changes required to transform a bare bones unlit shader to actually register on the UI system.

Creating a Forward/Unlit shader, all that is needed to render it compatible is to open the ShaderSource and to remove:

Tags {
"LightMode" = "ForwardBase"
}

There are probably more things to change or disable to get a truly UI friendly shader, but my question is this:

Is it possible to create an additional mode to make UI compatible materials?

That would be great.
Cheers!