The decision of their coach Michael Bradley to bring in so many new signings the season after reaching the Heineken semi-final has come back to bite him hard.
It has been obvious that the influx of players has not worked. Their unity of purpose that was so evident last season is not there anymore. They were abysmal against Leinster in the PRO12 last Friday.
In fact, the Scots have looked dishevelled and disorganised all season, being beaten to nil by Munster (33-0) and Saracens (45-0) in the Heineken and losing nine of 13 in the PRO12.
Munster haven't exactly been on fire themselves. Their recent defeat to Cardiff Blues in the PRO12 was further evidence of their struggle to find their feet.
Coach Rob Penney is still finding his way at the province. A defeat in Edinburgh will end this season's Heineken Cup odyssey almost before it has begun.
They will have to take four points - minimum - away from Scotland. If Racing Metro can then clip Saracens' wings in Paris, it would leave a straight shoot-out back at Thomond Park.
That would be something to set the pulse racing. First things first, Munster have to drive another nail into the coaching coffin of their former scrum-half Bradley.
Edinburgh v Munster
Sunday, SKY SPORTS 2, KO 12.45