On Maniphest tasks with a particularly large number of subtasks, the task graph completely hides the list of subtasks. (See screenshot below.)

While the task graph is a very useful feature in many cases, it should probably be made toggleable/collapsable, and have it collapsed by default if there are a large number of tasks. As it stands, one of my employees had to use a Maniphest query for regularly viewing the subtasks. It was impractical to scroll all the way to the bottom of the list, and all the way right on the list, in order to view the subtasks.