What does the Crafting stats do?

[Estellios]

I thought craftsmanship was for getting quality up faster and control was to fail less?

This was what people thought waaaay back when the game was first released. A few months after release the devs stated exactly what Conradus and Fiosha said. The popup help when you mouse over Craftsmanship/M. Craftsmanship/Control also say as much.