Bethesda should just dispense with this 'game' nonsense, and simply release a construction set, and let us deal with it. Could it work? Kidding aside, not as a replacement for games, but, it might be fun if Bethesda just released a future construction set in the interim between game releases, with a couple of basic meshes etc... and see what the modding/playing community make with it.

And what single advantage that has over the current model? None.

Curiosity. The spirit of enterprise and experimentation.

And why not wait for the full game and the modding tools that come with it?

Curiosity, experimentation. I don't think I need to qualify these things.