Yea, dump all that stuff. Way too much. But here is where I differ my opinion with OneLess, and that doesnt mean I'm right.
Take your riding shirt, whatever it may be, say a Under Armour, and jacket, then just take a Gerbing liner. It has a wide range of warmth comfort. Leave all the layering home.
"Every bike I ever had, was the best bike I ever had, when I had it"