The delay on PWLib 1.2 is related to the inability to currently work on the new Tutorial/Reference book (PWLib Unleashed). Once the team is available, work will begin on the book, for it to be completed as soon as possible.
The book is an important asset that must be done before 1.2 is released, since it will cover all new features. While current 1.1 code will work properly on the new version of PWLib, the new features would require tutorials on their own. So for a better, complete release, the new version will be out only with PWLib Unleashed.