Jon
I'm on this journey for more then 3 years. You were feeding us for about a year how busy you are with upgrading siena and instead of upgrade we get downgrade. With the business account login, what means the apps can't be published to store (ever), you have destroy the siena hart completely, the most important feature about it. Without it the powerapps is nothing more then extension to a O365 and another cloud services what makes them more desirable. This is the only point for you.
The previous siena team made siena to help business by sharing the apps with customer. For example this one created by previous siena team
https://gallery.technet.microsoft.com/Siena-Personal-Shopper-854f350e
THAT ONE IS MEANT TO BE SHARED WITH CUSTUMER
And what you done? AN EXTENSION TO YOUR CLOUD SERVICES AND O365 because the app can not be shared with others only WITHIN THEIR ACCOUNT
THIS IS NOT WHAT BUSINESSES NEED!!!
But obviously you have made your decision so either do I. I always thought that siena will help windows store to fill it with all useful apps. I bought a windows phone for $500 a year ago and I have to use it as a internet browser because there are no apps for it. And if there is one it is only a web wrap where is easier to use internet browser. The only one app I'm using for my personal usage is an example how to not make user interface but unfortunately it is the only one in store what does the job. Obviously you have totally destroy siena and hope for change that means I'm done with Microsoft unless you prove me othervice. And to prove you I'm not bluffing I can even send you a link to all my device on ebay by the end of this week and you can even check all my accounts slowly being cancelled
