They would have to do a major revamp of the instance, or else I imagine it going something like this:

-You port in. The tank takes off at a sprint, determined to skip every boss possible, which is pretty much all of them, excepting Thermaplugg. This, despite your protestations that you really need some gear that drops off of that bot who resides in the ass-end of the instance. (If you are the tank, just swap this out for DPS who will bitch at you for not skipping straight to the end.)

-Rather than take the long way around, someone decides the best way to go would be to jump down off the platforms. So the group of you all drop carefully down, avoiding a splattery death, except for that one guy who can't figure out how to land properly. But you keep going, except now that guy can't hook back up with the group because he's died and re-zoned four more times while trying to nail that landing. (Alternatively, one person goes off the platform alone while the rest of the group takes the long way. Now he's sitting by himself because he expects everyone to join him.)

-You start pushing through those long tunnles filled with Dark Iron Spies and other assorted mobs. First you wipe because somebody keeps setting off the mines before they can be disabled or ran from. Then you wipe because some putz can't figure out to stop casting while the defense bots have spell-reflect up. Then you wipe again because somebody accidentally attacked a mob in another part of the tunnel, drawing about 20 mobs down on the group.

-You finally make it to Thermaplugg. Except since it's heroic, you now have to actually worry about the buttons and the adds. But since nobody ever paid any attention to those, you'll wipe several times while the group gets overwhelmed with adds or blown to bits by the bomb adds. He finally goes down, except one guy rolls Need on loot for four different specs and then runs off laughing back to his server.

Does that sound about right?