Separate repair to an individual craft

I am not a crafter, and I never like to sit by AH for hours to play with the economy. The only reason I am leveling crafting is for repair, however the system we have now is forcing us to level every single craft. This may cause a huge problem in future where the AH will flood with unwanted items which later on crash the economy. What if we can separate the repair to an individual craft where people like me only need level this single craft and left the crafting to the people who enjoy it.