Crafting items to complete writs should be returning mats of closer rank. It's annoying completing writs using up mats I could be using for my ch160+ character. For example, for today's blacksmithing writ, I was asked to make a rubedite greatsword, gauntlet and sabaton. My reward was getting a bunch of high irons back, as well as some soon to be decon'd gear.
I probably wouldn't be bitching as much if I had gotten an sealed master writ instead, but, all the same, that kind of material reward just blows.