Oh my! The saddle shoulder would look way cool, especially with the cable extending into the saddle shoulder piece...however, do remember...that will affect the dynamics and measurements of the fronts and back...and the hood, too.
It would be a math nightmare that I personally would avoid.
You might find it fun and challenging. Not me!
I just came back from "Design World" after knitting my brother's Rick Ryan Jacket...and I still feel battle fatigue!