One thing I noticed with the five styles of baffle designs, is which gives the most loft for given material. The box baffle seems to be the design of choice for most quilt builders. And I feel it gives the most loft, while using the least amount of material.
Where weight is a critical component of hiking gear, adding additional layers of fabric would an absolute no-no. It may weigh a few oz. more than another style. And the added cost of additional layers of fabric.
Sewn thru uses the least material, but would have cold spots where the seams are, since there won't be any insulating material at these points.
The box baffle seems to be the best of both worlds.
And one of the easier designs.
Karo step is another technique, that should be included as an example.