With the 204, this is a a great level! Each part of the structure is meaningful in its own way, and the potential optimizations are realized in great ways - all without losing the original core route.
I would say this is fairly approachable too, despite its looks; the route is tight and it becomes clear through prodding what you must do.
It's a nice idea, but the execution is a bit too simple - if you have experience, then the solution will be immediately obvious - but it is a fine distillation of the Stow concept.