The Time Entry view would ideally have an option to automatically show ALL related projects and task which a resource is on. In other words there would not be a need to create a new row or import anything from assignments or bookings: everything would automatically be there when a resource has an assignment or a booking.

If a resource is on 5 tasks on a single project, the time entry grid would have one project row which then expands to display tasks a resource is on. When a tasks is closed, it disappears from the grid until reopened.