My suggestions would be:
1) Drill some holes down the handle to skeletonize that part some and reduce packing weight. Keep the heft in the head, as that's what does the work and it will be more efficient as such.
2) Sharpen at approximately a 40* inclusive angle to get a good blend of penetration and edge durability in the steel.
3) Run the 1095 heat treat on the low end at 58-59 hRC to improve edge durability.
4) For the sheath, I would look at what Eastwing does with their hatchet/axe sheaths. They have a very good design that is simple but works well and allows for belt or pack carry. Maybe even include a couple small brass D-Rings at the top so folks can attach a sling if they want for baldric carry, lashing to a back quiver or pack, or packing on horses. No need to get fancy with the leatherwork, but something solidly built, with good protection, and with a versatile design would appeal to almost all users.