so we all know the problem that blueprints give us. We currently need almost no ressources for it but can set whole castles within seconds.
My idea is to add an additional workbench to create blueprints. When you open such you will get a window the same size as your screen. Basically a virtual world to build in. You would have all textures and construction elements, objects, etc. available without any costs and could create whatever you want.
When done you click on a save-button and the blueprint is saved.
Now when you want to craft that specific blueprint it will show you the material you used in the virutal world to create your blueprint. Could be i.e. 100 wood, 500 stone, 2 chairs and 7 doors. Have that all in your inventory for crafting + an unused blueprint.
That would not solve the issue for big castles or such buildings fit into the terrain but it would surely allow immersive use of blueprints for i.e. decoration, furniture, etc.