Right now we have Normal Quality and High Quality items. I'd like to see third quality added in game to make crafting more fun.
It would work like this:
When you increase the quality to 100% the quality bar resets to 0% and the Excellent Quality chance starts increasing. Get it to 100% second time and the EQ item is made. Fail to do so and HQ item is made.
This would improve the diversity of items for crafters immensely while requiring reasonable amount of resources to implement.