Caution is the best course here. When using this traditional tool, avoid injury is always the first goal. Make sure the steps in each movement, as well as load comprehension for both you and the client, is well practiced. Eagerness for new moves to keep a routine fresh can cause some lack of caution. Please be wary.
However, in the short term, whilst you find and practice the new moves you have selected from credible sources, try this:
Review the current moves step by step and use each move Isometrically (when appropriate) and even add a few of the portions of a compound kb movement with new movement patterns. Like a KB snatch Lunge!