Flow nicely integrates with various email services, I see separate Actions and Triggers for Gmail, Office 365 Outlook, Outlook.com.
All these services follow a similar pattern. They allow emails to be fetched from an inbox and access the Body, Subject, To, CC etc, which is all nice and well. However, what is deparately needed is the ability to get a copy of the full email in MSG or EML format so the entire email can be passed between services so it can be archived or processed further.
I see quite a few people asking for this in the forums and we need it as well so our customers can pass emails (as MSG or EML) into our Flow based PDF Converter.
Most people ask for a very specific implementation (e.g. Store email in SharePoint), but as we already have the facility to create files in SharePoint (and DropBox, OneDrive, Google Drive, Box.com) we just need a generic function in each of the provided email services to 'Get email as MSG'. From here on the MSG can be passed into other services without tying the implementation into a specific service.