We often use the 3D subdive window not to cut objects, but to see which objects are selected. You can also use filters for this, but if you want to see the linked objects (task with assignments) for each task, setting filters is too much work every time. This works better with the 3D subdive window, but is not intended for this.

If there is a separate window for this, you can specify extra options here so that you always see the linked objects to a task without having to make the setting of (task with assignments), because you cannot always use this setting in your work 3D view. But also that you can see which appearance profiles the linked tasks have. It is often difficult and a lot of checking work in large projects.