I didn't expect to find so many interesting holds here, every architect tried to make his best to win the contest. My favourite ones were in order:
1. Bibelot: I can't understand how this didn't get in the first places, the only explanation I can think about is that just few people reached the exit. If you solve the rooms but don't get to the exit you can't really appreciate Bibelot's intent in this level.
This hold should be sticked in every DROD player's mind like The Fool's Errand is... so, if you never did, go back and play it!
Room
Click here to view the secret text
×1S1W makes you feel like Houdini, Larry Murk's Magic Show has much in common with it.
2. Agaricus: just like Stephen4Louise said the entrance is a great trapdoor puzzle.. & I haven't already played Bavato's Dungeon, but, from these few rooms, I can imagine the kind of difficulty I'll have to face. Can't wait.
3. DiMono: I liked mostly 1S, it's very original, as far as I can rembember I have never seen a room like that, surely not among the AE holds.