Please don't dump time into making it mobile friendly. Nobody with any sense is trying to diagram their infrastructure from a mobile phone, so you may as well focus on higher value features. Preferably ones you can charge for so I'm not mourning the loss of this great tool in six month's time!
I hear you, but I at least want to make it work on tablet sizes for some quick editing or presentation, and for viewing the results on phones (probably no editing).
Here's an actual screenshot kindly posted by Jeff Barr of what the UI looks like https://twitter.com/jeffbarr/status/674357220847443968