Increased internal size of Wicker Picker by one row and one column. Not sure that actually makes it useful, but lacking ideas for how to actually and properly balance it against traveler's sacks.
I suggest exchanging the straw twine in the recipe for cattail fibers. I would think once you have the resources to produce straw/hat, you're already capable of making hard leather. Lowering the tech of the wicker picker to something more easily found such as cattail fibers would make it easier for the nabs to produce early game, which is where its needed.