I know what you mean about that observation deck, Bob! It would fall loose but not completely down just running around the track on my old conventional set. I sold it when I bought the LC set two years ago, and wondered if they would have done something different, but no it was the same. All I can think of is they want it separate for shipping so it doesn't break off. 
I recall having a similar trespasser on my layout when I was a teenager. My sister's cat would jump up until I moved the layout to a higher table in the basement. My wife is a dog person, not a cat person, so we have not had any Catzillas since!
