We have "project" task types in our Space, and it would be so convenient and efficient to generate a Gantt straight from the task view. You would open the top-level parent task, hit "generate Gantt", and it would create a Gantt view named after that task. It avoids clicking around to create a view, choose Gantt, name it, filter your task, save it, etc. The generated Gantt could automatically be made private to begin with.