The war is over and Auto Layout won, right? Probably. But what if you find that your layout code needs to be orders of magnitude faster? That's not going to be a huge problem for relatively simple apps, but what if you're building something like the LinkedIn news feed? Nick Snyder and Sergei Taguer have put together a new library called LayoutKit which they used to do exactly that. It's almost as fast as manual layout, but with much easier management.
I missed this when it first got released but if you're looking for an iOS 9 compatible version of the new pre-fetching features of UICollectionView and UITableView, then you're in luck. Alexander Grebenyuk put together this library which does exactly that.
Keith Harrison on the new requirement in iOS 10 to declare up front which private data your app is going to attempt to access. This feels a little like Android where all of the access required is declared before launch, and is even listed in the Google Play store before installation. I wonder if the App Store is going to get a similar feature. Seems like a good idea.