Has anyone noticed this yet?
Some users have found that after updating to macOS 10.12.2, PDF crashes more often. Some suggest not using Preview to edit the PDF files, otherwise the user should keep the original file in case of any unexpected crashes.
As for the specific problem, the developer Christian Grunenberg has given the following statement:
Apple wants to provide the general base for iOS and macOS. But the release date was a bit early that Apple has given up some features without considering the compatibility. What’s worse, the old features are now affected and some of them can’t even be used anymore, and users get to find replacement or solutions themselves. The company has so much work to do to fix that.
In other words, Apple thinks more of how macOS compares to iOS. If the company thinks the same of iWork, then the features deleted for that on Mac may return. So I guess there is still something for users to expect.