Either I am misunderstanding, or you are?
You are saying that every single scene I make, I need to attach a Camera2D to it and mark it as current? Only one camera can be current from my understanding.
I have a Camera2D in my World that works correctly. I am talking about when building a Scene by itself.

Here's my scene in editor. The Origin is top left, but I center that on the sprite for easy centering, but running the scene (not the game), cuts off 3/4 of it.