Great post @Jerome_Dionne. I’ll add one more idea (haven’t done it myself yet so take it with a grain of salt – or more).
Not a fan of SPD/clip in pedals on a fat bike. I ride flats on my fat bike with either my Steger Mukluks or my Vasque Arrowheads.
In threads on the Assioma hack on two other forums it was reported that the iSSI III model pedals use the same axle as the Assioma. iSSI has this article on choosing winter pedals, and their Flip model has cleats on one side and flats/pins on the other.