You bring up another good point. NQ is completely worthless. I'd be more content with their existence and materia melding if the NQ could achieve the same as HQ but simply required proper melding to do so. This is a lazy fix but it'd require simple number balancing.
The quality bar is a nice idea for crafting, but it's an illusion of choice. Also, with some of the artisan gear it still comes down to chance. I've messed up at least one 4* because I got no TotT procs and failed 50% of my hasty touches.
I'm surprised Artisan off hands even sell for you. The only people that would want them can usually make them anyways. It's self-defeating.