Great article! Whenever I see the SAFe diagram it reminds me of Homer Simpson's web page - http://www.homerswebpage.com/

Just one minor thing, I think your math about the explosion in communication channels would be clearer if you added in the exsiting team members too. Doing that would be 46 x 45 / 2 - 36 x 35 / 2 = 405 new communication channels overall!