Windows give much away. If the party does a circuit of the building, they might see a wight hiding in room 13, or treasure in room 32. A path leads easily up to room 9, but a copse of trees hide the entrance to 41. Spot 42 has been converted to a simple dumbwaiter.
As in the original module, 20 and 21 lead off into the great unknown. I would personally have one lead to the Dungeon Station, and the other to, say, the Tower of Hylox. You'll note that some of the rooms have changed floors from the original dungeon.
In general, you may here embrace sequence-breaking. Smashing through walls and climbing along exteriors is good fun, and the players should do it! Leave construction tools (and destruction tool) lying around. Nestle rooms between other rooms.