I noticed that Merchant Prince's Folly is a lot more difficult than other skirmishes.
Same is the case with Castle Ravenloft. Parties that usually sail through even LOMM aren't able to finish CR due to the difficulty of the last boss fight. It's been removed from random queues, but it would be nice if Strahd was finally fixed and the dungeon returned to queues.
Same is true with Assault of Svardborg in trials, though not quite as disparate as the other two queues mentioned.