Yeah, the blueprints thing and being able to pick up whole rooms and move them around are the only things I really wish was in 3. (Maybe something else to but I can't remember anything else atm.) I'm terrible at building! I found a floor plan online I was going to use to build Adam and Eve's house, but after about 2 hours I gave up and downloaded one like I normally do. :D
ETA: But at least I'm getting better at decorating. For the last 4 or 5 years or whatever I'd buy a furnished house and only change the beds to better ones or add objects to skill with. I try and furnish and decorate them myself now.