It’ll sure be nice when someone designs a block pattern or block template that lets us actually do our own layouts instead of finding and depending on someone else’s pattern that does what we want. Without us having to fire up a full SASS/SCSS stack to fiddle it ourselves.

Have you looked at GenerateBlocks? Either combined with Justins Block Pattern builder or Genesis Custom Blocks? There exist a lot of tools for Gutenberg that positions itself somewhere between "from scratch" and "prefab".