It's an attractive and effective style. It also looks like you can reproduce it fairly quickly if you've got a lot of maps to reproduce for a game.

If you're mapping mainly for game, with regards to the pillars in the lower centre room (I'm always happy to see roof supports) - the best thing to do is proportion the room so the supports sit evenly at intersections, or sit evenly in their own squares. You avoid questions like "is there enough room for my character to move there?" and stuff. And whether it provides cover or whatever.