Martyn, large axes are commonly carried on horse, 4-wheel, snowmobile, canoe and snowshoe/sled trips in this country.
I can see the benefit of a large axe if you are carrying it on some kind of transportation, but I'm struggling with the benefit if you are backpacking. The only benefits of a large axe is that they cross-cut better and split better. But the Gransfors axes (with the exception of the Large Splitting Axe & maul) are poor log splitters in any shape or size because of the very thin bit. That means people must want these big axes for cross-cutting logs and that's what I dont get. A saw, will cut a log in half in a fraction of the time and with a fraction of the effort and at a fraction of the weight. Sure, if you are in a four wheel drive then why not? But if you are backpacking, then you have to consider every ounce and will carrying that ounce pay dividends? I just dont see how backpacking with a large axe pays off better than a light folding saw and a small splitting hatchet?
out of curiosity why do people have such a dislike of carrying a heavier axe?
Because they are heavy to carry!
I've nothing against bigger axes, or axes in general - I love em in fact.
Of these though....
By far the most useful (to me anyway) are the large splitting axe and the tomahawk. I would never backpack with the splitting axe, it's far too heavy. Of the other 3, the tomahawk is the lightest and by far the most versatile. Ther narrow bit means it penetrates wood well, which although it's as thin as a GB, means it splits better. Because it is a hawk and the head pops off with a tap of the shaft (like a pick-axe), then the head can be used like a splitting wedge, or a chisel, or a hand axe. The hardened hammer poll means it can be used to smash stuff, nuts, sticks and wotnot, used to pound on when driving into a log, used like a mini anvil and obviously, used like a hammer. Because it breaks down, it can also be carried easier, with the heavy head going inside your pack, centrally and high. Replacement handles are cheap, easy to swap out and come up to 30" long which means you just cut it to your preferred length. It's a great tool and best of all, it only cost £30 quid! How good/bad they are at cross-cutting is irrelevant to me as any cross-cutting is done with a saw.
Would I rather have a bigger axe? Yes (the large splitting axe is awesome and nothing is going to beat a husky and a 5lb maul). Does the benefit of having a bigger axe make it worthwhile carrying it? Not to me it doesnt!