You can see you have a certain number of friends in the world, and it shows their icons, but viewing the world details for the same instance only shows a generic friend icon.

Why does the world details page not have the same little UI widget showing the user icons of my friends who are in this world?

Also, the region icon has a really strange location off to the right with far too large spacing.

See the mock-up below for a revision of the world details page to have proper parity with the new profile page UI for instances.