The fact that Bossk dared to hiss at an Imperial officer on the bridge of a Super Star Destroyer tells us instantly that he is bad(good bad), and he isn't afraid of anyone.
Ric Olie is just some Nabooian pilot who seems to be on anti-depresants and likes to point out the obvious. As if we couldn't tell from the next few scenese that Coruscant is one big city. That line seriously needs to go.
Besides that is an understatement. The place covers a huge planet and is Kilometers deep. Even after being thrashed and settled on top of by the Yuuzhan Vong, there are miles of Coruscant buildings still standing under the new vegetation, and that is just above ground. It would take somebody longer to explore every inch of Coruscant than to travel to every system in the galaxy.