I was referring to the webbing being stitched to the strap along its length in multiple places, and the strap "puckers" just a tiny bit, especially on the bottom-most section of webbing. (hard to explain without pointing at your picture).
I will have a hipbelt. My concern is because I made a really big pack (like 80 L) for carrying tons of climbing gear to a base camp, which had a hipbelt and frame, but the webbing on the shoulder straps kind of digs in to my shoulder when the load get up around 60 lbs. So I was thinking I need to either use much stiffer foam, or do something to distribute the weight better across the width of the strap, like using Xpac (the fabric I used on the other pack is much less stiff than Xpac) and (I hope) not using webbing so the load is carried by the whole width of fabric.
This pack is going to be 35-40 L though, so the loads will also be smaller, but it will also have a removable hipbelt so I can climb with it on. So I'm thinking either a single or double layer of Xpac on top and I've got some nice 330D wicking cordura for the underside of the straps.
Ahh the joy of the design process...!