Using Blueprints as groups. Yay or Nay?

I was just wondering if using world geometry and turning some parts like complex walls and floors into blueprints so I can group them without using the other group tool that moves the origin making it difficult to snap to grids. Is it bad? would it effect rendering or lighting/like baking badly? I doubt there is prob an easy answer to this question but I thought I might get some better input from the community on this question.

Thanks