Originally Posted by
Ealyssa
I'm pretty sure it's more about the combination of NM being so easy and overall less players for the last tier that just make way less LFR players in queue. Making it harder for the matchmaking system to create fresh groups when so much are needing refill (because players are leaving after killing the one boss they need for a specific token).
That said it's just speculation, NM is so easy I only tried 3 LFR wings this tier (and as suspected it wipes way more than any NM pug with half the raid at 3K dps).