Gutenberg needs a "Save/Add Block to Library" tool. This would allow a non programmer to use nested Gutenberg Blocks to create simple reusable layout templates for clients or employees to build things like product pages.

Bonus points for an "Export/Import" block tool!

My current solution is to create the layout I need, then open the Gutenberg "Edit Code" and copy the layout into a text file. I often do this myself, but teaching a client how to (non-destructively) paste code into the visual editor is far more difficult than it seems like it would be.