As a former Project Based Learning teacher, I would routinely have students draft proposals, work on driving questions, and push the boundaries of what we were trying to accomplish in our project. Even without a project based learning approach, there is a lot that can be accomplished with the approval feature.
For instance, you could approve and review paragraph by paragraph as students work. You could approve hypothesis statements prior to starting a science experiment. You could approve a logo design for a project. You could approve student dress up days or positive behavior interventions and support awards. There are many things that can be done. In addition, it can be used for a help function as students work through complex activities.
Below is a short video of how the process works. I asked myself to approve something, which adds a little extra, but you can see some of the options and features on how this new tool works!