Yeah hey! I'm the one behind the production. I can only attest to what a great framework NodeCG is. Lange and Matt have been instrumental in the preproduction behind our stuff, helping us reaching our goal.
The entire stream was part composed in CapsarCG and part composed in Chrome using ThreeJS with decklink inputs. I'm going to blog about the strange setup.
I also wrote a scraper that fed the game events realtime over socket for the decklists and turn switching.