That's interesting, though it seems like a rather severe oversight.
I think I'm going to stick with my own version of Sharn, free of superbridges. It gives me a good reason to fill the sky with flying vehicles and I like flying vehicles.
You too? Have you read the mini adventure in the ECS, the Forgotten Forge? There's another Mario-like passage within.
[sblock]In the battle in the sewers, with the pipes that shoot hot vapors regularly. If I run that adventure, it'll be hard to fight the urge to describe an adventurer getting shot by a vapor cone as starting to blink quickly for a couple of rounds, during which he's invulnerable, but he now size Small until he finds a mushroom. [/sblock]