I was excited when I heard about blueprints, which I thought was going to be like having shells of houses that could be swapped around in the community but without the need for store-bought or EPs. Digging further though, it seems that is not the case. From what I read on one of the interviews it's like block rooms (probably similar to Sims Social on facebook) so that might be interesting. I'm architecturally challenged, so manipulating rooms like tetris blocks is easier than coming up with a design of a house from scratch.