I went ahead and made that change. Before:
Let’s get this discussion started! There are currently 3 / 5 topics and 8 / 30 posts. New visitors need some conversations to read and repond to.
After:
Let’s start the discussion! There are 3 / 5 topics and 8 / 30 posts – visitors need more to read and reply to. Only staff can see this message.
Kind of annoying that we have three “different” translation keys for this copy to cover the “only more topics needed” and “only more posts needed” cases.. 