Andy,
We have a conundrum here in latin america. No single messaging platform works for everyone. Not all of our people have facebook. Not all of our people have credit on their phones to be able to receive text messages. Not all of our people even have email addresses.
I am requesting that …
1. Facebook messenger be added as a messaging/notification method.
2. Users be able to select their prefered messaging/notification medium (SMS, Email, FB Messenger)
3. Whenever any communication is done on the site it would be automatically delivered via the users preference.
So… Instead of SMS messaging or Email messaging in the menu there could simply be a Messaging menu item.
There the sender could send a message and leave it up to user preference how it is delivered or could explicitly select Email, SMS, or FB Messenger.
Rota reminder notifications could be sent via user prefered medium.