Custom PBS Metallic addition?

[Derpicidal]

I'd like to see a PBS metallic / pbs dual sided metallic with additional fields to input transparency areas basically like grabpass transparency masking from poiyomi as well as sliders to change the alpha level of those specific areas & distortion effect as well, I'm not sure what version of poiyomi has it but I know it's a thing, I don't entirely use toon so would really like to see something implemented with pbs metallics. The photo I've linked, the areas circled are all majority one material but using grabpass masking to distort & alpha specific areas. I'd love to see this implemented!