So I started with a little prototype for keyboard support for graphs such as blueprints, materials and others. I personally think this feature could really improve development time, because using a mouse is just slow sometimes and annoying. This thread is just to keep you updated and for feedback. Let me know what you think of this feature, what you would like to see and ask if you have any questions.
If you really want to stay up to date you can keep an eye on my twitter
The attachment is a gif that shows the concept.