Interesting that several people complained that once they know a scenario they lose interest in it.
If you've played a scenario before, you can agree at the start that the OL can rearrange any of the traps, monsters, chests etc. as long as they don't alter the number or type available, and that any special scenario rules aren't broken. The OL should make a note of any changes before starting, though. Should leave glyphs and keys alone.
Of course, if the OL puts all the monsters in the entrance, and all the treasures in the boss room. you should hit them over the head with the box.