The Mx deck is a near-perfect example of baking in far too much extraneous, superfluous process at significant expense in both money and time.
The political decision to proceed with this project has essentially been made; there is no extraordinary environmental impact of a negative nature as a result of this project (minor, specific elements such as watercourse crossings can be the subject of a far more scoped study).
The idea that you need to drag out this studying exercise for almost 2 full years beyond what's already been done, and then get only to 30% design..........sigh.