Decision made email came this morning for us! I'm hopeful that there is an approval coming our way, and that it's a good sign that a decision was made only a day or so after sending in our missing documentation. I'll be keeping my fingers crossed that everyone else waiting gets some news very soon.
Here's our current timeline, and I'll update again once I get the actual decision:
Priority spousal visa
Online application submitted: February 21, 2017
Biometrics completed: February 24, 2017
Documents shipped: February 24, 2017
Confirmation of receipt/processing from Sheffield: February 27, 2017
Request for more info from Sheffield: March 21, 2017
Decision made email: March 23, 2017