AC made a decision several years ago to increase fleet utilization. I remember reading that they were hoping to average 14 to 16 hours of utilization per day for the 787 fleet rather than the typical 11 to 12 hours, which was considered good for a fleet at the time. So now instead of having one plane cycle back and forth between Toronto and Europe with several hours between flights, the plane lands in Toronto and leaves again almost immediately for Asia (or wherever). The consequences are obvious.