Hi Kai,
You seem to have a good system but here are a couple of ideas. A 4' rod case tells me you are using a 3 or 2 piece rod. You should consider a 4 piece graphite rod. A 7' 8" or 8' rod would get you down to a 24" carry tube. There are graphite rods available with two tips. I don't think I would want to use one of my bamboo rods for back packing.
Instead of a net maybe one of these would be a better choice. It would be lighter.
Landing Hand
When I back packed I didn't use waders but maybe you need them where you are at. You didn't say what you were using for wader boots. I assure you are not using your hiking boots. If you eliminate the waders and boots that would be a savings for you.
Instead of carrying two large fly boxes I would go with small ones or at least mid-sized.
Frank