I like Phantasm's idea for a bit simpler divider.

On the other hand using n9103's setup, but using filter inserters maybe makes a factory look a bit cooler

Here is an idea I have for the extra information you get when you use the alt key on assembling machines:

Currently it only shows what the machine is producing. Very useful indeed, but I often wonder why a certain assembler is not producing. Maybe you can include little icons below the current icon ...