There's no space in Xcode 7.1's app icon asset catalog for the iPad Pro's 167x167 app icon... aren't asset catalogs the current best practice for adding app icons? If not how are we supposed to add it?
I was only seeing iPhone sizes on the AppIcon assets section (XCode 8.1). I think it was because I had originally built the project targeting iPhone and then added Universal support later. To add the empty iPad icon spots: