For me, the main appeal of Facebook Paper is the way it presents my News Feed. One of the issues I've always had with it is the lack of pull-to-refresh to force my feed to reload.
As it turns out, the pull-to-refresh feature is present, but doesn't work when you pull down on your feed. You probably have already noticed that pulling down when viewing your feed will open the app's menu.
But if you pull to the right on the image at the top of your feed, upon release it will refresh your feed.
If there are new items in your feed, you'll either see a number indicating the number of new posts, or the cards along the bottom will shuffle to the right, stopping at the most recent post.
The little things in life -- or apps -- make all the difference.