If they allowed every player to level every craft to its max desynth level it would make those items less valueable. Remember the lower amount of people that can desyth that item the more it will be worth. I rather liked the way WOW had there crafting system set up you could only have One Major Craft and a Secondary minor craft,prefrence to one that compliments it. Such as Weaver/Bontany. This was a great way to add diversity to the craftingsystem and prevented the overpopulation of crafted items making the value of that item high.