Can others check, I'm now seeing the our domain as the sender domain in the 6 digit emails!!!This is awesome, but I can not find anything in the Shopify change log.

You might want to explore the new Send Admin API Request. 

You might want to explore Dynamic Sources Add your Image banner building block to the template.Click that Data symbol in the upper right. You can then select IMAGE. This will populate the banner with corresponding image of the collection you are rend...

This is a critical miss and a head shaker.  With two Shopify Plus stores its really disappointing in how the new customer accounts is handles. 

+1 for this!