LAS -
Can't speak to their attempt at a retrofit, but the P180 makes sense. Williams are light, it should work. No doubt some engineering, but if you are making the case that you need more rudder in an asymetrical yaw with a jet vs a Tprop then you need to get some multi training under your belt.
To me it's seems a no brainer, but who knows maybe it's not in the wing or w/b but other factors such as the AF can only go so fast.