I use Blueprints all the time. Either lamps, fencing, parts of buildings, Sets of scenery, or even some repeatable full buildings. I also use community blueprints to use as a base start for structures in my park and customize as needed. saves a lot of time in the end...and I still have to be creative to make them my own. I see nothing wrong with using repeated work all ready done if it works with what you are trying to accomplish.