Having played Wow from BC onwards, I think it's a pretty silly idea to go all gung-ho for multi-level, multi-path dungeon instances. Back in the days when maps were NOT supplied, instances like Mauradon were an exercise in frustration -- nobody wanted to go through them because (a) they got lost (b) purple or orange pathway first? (c) it took waaaay to long. Finding a party for that instance (which was a leveling instance) was problematic, although I will give you points if you played through it in 1.x, as there really wasn't much to do if you couldn't find a raiding party back then.

As far as those suggesting the 'scenic route' ... just try taking the time to read the texts in Gubal Library some time while in a daily DF. See how long you get to admire the scenery. Sheesh.