It's not sorting, it's the tag that's needed.

I'd love to know which mats goes to which profession(Skin will have a Leatherworking tag in it for eg). Whenever you got your hand on a new mats, you're like "What does this do?" and can't sort it properly.

The same could also be apply for gear set, having taken almost all class as I am, I have no idea which gear is on what set.

Having taken FATE as an idea from Guild Wars 2(I think so), it seems SE didn't even try to take as much of their idea as they can.

For eg, in GW2, you have access to a material bank, you can access it from everywhere and automatically sort item in place, and you can place your mat in there just with 1 click. That's the sort of thing FF14 currently need. I believe SE somehow made this awesome idea of GW2 into what we know as "Armoury Chest", which, afaik, fail horribly when it come to sorting.