I used a macro found here a couple months ago to grind through med crafting to get to novice BE in about 4 hours. It worked like a charm, but I noticed that the /nextcraftingstage didn't advance the screen. Instead, the icon of whatever I was crafting simply disappeared. At that point, I just closed down the crafting window by clicking the x, and the macro went on to my next /ui button, which had a second, third, fourth, etc crafting device. I just had to pay attention to when the icon disappeared, and close the window. If I didn't close the window on time, I would get a failed to craft error.
Doesn't really help with crafting afk, but definately speeds things up.