Really like the planner feature. Has a lot of potential. Feels a little buggy at times but I really like the concept of having tasks on the left used to work and all day tasks above which can be used for scheduling.
Because there is so much potential in my opinion with the planner, I would like to consider the option of having users be able to review and potentially adjust other user's planners. This would need to be controlled as a workspace setting for users as I don't think everyone would want this insight.
One of the ways you can handle viewing tasks that are private is just to show a blocked out time or tasks that says private or something similar to respect privacy but still allow insight into planning and schedules. Would be very useful in our situation. Just a thought.