Alas, there are several breaks in the "running flow" in the outer corridors, a JP here and there would have significantly improved the flow of the map. You could RJ to avoid this, but IMO, this is not something to "force" on a player. The height of the map could also be 50% or so higher, to make it look less flat, and to give the players more "breathing" space above their heads. Note: The present height plays well, it's more of a aesthetics thing to me.
I'm not a sm-specialist but looks and feels nice. :)
I'll give it a try anyway.