Co-efficients work pretty much as every group in T11 contains a league winner, 2nd, 3rd and 4th in each group. So league winners are always most likely going to draw an easy group each season.
that still don't explain why my best friend who was in every CL with me is in a different CL , he finished 3rd behind me, and hsi QT is 54, mine is 56.. we played in same CL when our gap was even bigger