Thank you for your feedback. We are working on customer controlled failover for both disaster and DR drill scenarios. Please contact email@example.com for more details about enrolling in a private preview, and for any further questions.Shaun Laughton commented
Tis really is a glaring omission. I may be overlooking something, but this kind of feature is available for Azure SQL Database in the form of Failover Groups. Why not storage?
Zone transfer is on our roadmap however not planned for CY 2019.