Am I the only one who like the idea of closing with Diamonds?
And besides, the show may have a theme/concept/storyline so it might make sense to end with Diamonds. What if the story is about Rihanna going on a quest to find Diamonds or something?
Moreover we don't even know if that setlist is real. I think we should just wait until the show is over to see the real setlist and then form opinions on the tour.