I think Bonewerkz is not so clean and new as you say! Look at this!
Mountains of bone powder everywhere, bricks are missing in the wall... This is surely a nasty filthy place....
Talking about Slig barracks. That is the only area I don't really like. It makes me feel down, so it fits perfectly in Oddworld.
FeeCo Depot is just funny. So clean and attractive. It's supposed to be a tourist center I think, with things like unlce Aslik's tourist tips. But tourists like Abe doesn0t seem to be welcome....