Disappointing to see Chromecast built-in is not included. There is support for the google assistant for voice control but without Chromecast you can't add the device to an existing multiroom setup that is based on Chromecast.
I'm interested to hear about any reasoning behind that decision. Earlier it was stated that the Node 2i did not have enough resources for Chromecast but that should not be a showstopper anymore with the new node.
Seems CA and Naim are the only ones capable to create a complete streaming component with Airplay, Chromecast and Roon support.
I think it is a shame it doesn't appear to support Chromecast as you suggest, however are you fully aware of how Bluesound works as your main streaming solution, especially the APP, which imo is simply best in class. Equally this fully supports MQA, which again imo is the best solution to 'Hi-Res' streaming. Obviously this isn't supported my Naim, which has always puzzled me, so I guess it's hard to find a true 'complete' component, as you suggest