When there is significant change, Admin should send an announcement to all users ahead. Either the news widget or Stickest or Byobu is the substitution so far. However, they are actually different.
Not everyone will read the stickest posts but I would say most of users will read their notification.
And When users haven’t visited for a long time, they are able to understand what have happened at once.
I think there is something that really missing now.