I've been wanting to tinker with upgrading the shoulder straps on my hybrid. I'll start by saying two things: If you don't carry a bunch of weight, it's not necessary in any way; and if you don't want to hack things up, I am hopeful John will be looking at offering a "packout" upgrade type of...
saddlehunter.com
If weight matters to you, buy a gen1 hybrid.
Cut metal off fork plate, remove ground chair standoffs, remove mesh from molle seat frame, swap belt to the front, get shoulder harness that offers padding since mesh is gone, remove hook for seat.
You should be in the 10lbs range. Mine with load lifters, exo belt and harness, and all the doodads removed is exactly 10lbs.