Maybe I am being overly critical. But from the report old mate flew 2,5 km past the MAP without conducting the turn, a turn which is written in big bold, capital letters with MANDATORY scribbled on there..
Put another way, if they had followed the procedure as published, would there have been a breakdown in separation? What if they tried this kind of thing into ZQN?
Anyway, not saying they're solely to blame, ill retract my muppet comment.