One thing I really have a hard time getting used to is all the sub-forums in the rules forum here. All the rules questions and discussions are so fragmented and hard to find.
So... because I am happy to see this old thread, I just wanted to mention here that I started a thread about the exact same topic:
viewtopic.php?f=4&t=38257And people made some good arguments about how the game is designed to be played in an open gladiatorial arena. It's not meant to have "real" terrain features, and therefore there are no rules for them in the rulebook. "Hazards" aren't real terrain, they are just features that break up the arena floor, but that never block LOS.
Playing AR in a labyrinth seems like it could be super fun. It's just not something the current rules support. Walls and elevation don't exist in the game as it currently stands.
So... I'm thinking this would be cool expansion potential.
Like how Blood Bowl has Dungeonbowl as its labyrinth-based alternate game expansion. You never know.