- Playing a Act I Quest card in the Campaign phase directly before the Interlude is not possible. All published Act I Quest cards include the sentence "You cannot play this card if the Interlude is an available quest." Thus, the "cheeky" OL play is allowed according to RAW.
- I disagree with Zaltyre that the old rule (before starting the Interlude heroes are required to choose a quest from a Quest card if any is in play) is just a poorly worded version of the current rules.
1. That is mostly true. The rumor quests from Lair and Trollfens do not say this.
2. "Sadgit, you're not thinking fourth-dimensionally!"
My case for the Lair rulebook being a case of unfortunate wording is time-dependent. There definitely have been rule changes in addition. I invite you to rewind to 2012:
Lair of the Wyrm is released. As you pointed out, the rulebook contains that infamous passage:
If one or more Act I Quest cards are still in play immediately before playing the Interlude, the heroes must choose one of them to attempt (before proceeding to the Interlude).
April 2013: FAQ 1.2 is posted. It has a Lair section, but no clarification for rumor quests.
Oct 2013: Trollfens is published, and it contains the same phrase quoted above as the Lair rulebook.
Nov 2013: FAQ 1.3 is posted. The Lair section now contains a general rules clarification: