They have changed their last a few times and now have a wider forefoot with a less-wide heel, which is a big improvement.
It is an improvement for those of us with wide toes and narrow heels, and midfeet that are in between. But not everyone is like that. There are a fair number of people where they are all about the same width (I was told that is the "Italian last" foot shape, which Edea at least initially designed for), and it is pretty common for the heel to be wider than the midfoot. Though in my case, Jackson didn't go far enough in the width differences between toes, midfoot and heel, and they assume the toes are longer than mine, so that the balls of my feet are positioned wrong, and they bend too much there for my feet in any event.
I tried to customize Jackson boots that was two sizes too large for me by hand shaping a custom insole (and would have spot-stretched the boots too), but that was too big a size difference. Unfortunately, my size of men's boot is not common enough for any pro shop I've visited to stock.
It is impractical for stock boots to fit everyone. They would have to have hundreds or thousands of sizes and shapes to make almost everyone happy.