I believe there are reasons why Noobstown does not use one command block creations.
Firstly, several one command creations - such as your mentioned furniture command - are available in plugin form. I do believe there was a topic about that recently.
Secondly, complex command block creations require extremely fast redstone clocks which could and would cause a large amount of lag on the server.
I personally am greatly interested in one command block creations, and often use them, but I don't think they are meant for Noobstown.