Nice but this is going to confuse Noobies even more 
I myself still get mixed up between the skill and the control binding and have to think hard when I come back to it after a long break 
I also have another binding, Openwebnet, for my devices and add Alexa metadata labels for items to be used via the Alexa skill.
Maybe a small schematic shown at the the top of both threads would help. It could show how all these things are/could be linked up in openhab with direction arrows to indicate the communication flow.
I found a schematic for the Alexa skill but not one for Echo control.
So, something like that but with the Alexa Skill, Echo Control and a Device binding all in the same diagram.