You said currently, have you heard plans that that feature will be available? It would be great if it was. We use it frequently in our stake to notify folks of important events and last minute changes that we would otherwise not be able to pass along. Of course hearing it in person is preferred, but that is not always possible.
At the very least, it would be great if a stake administrator could email to more groups at the ward level. I would miss the capabilities to send messages to the ward YM/YW, ward mission leader, primary, etc.