Being able to automate parts of Hype would be great. I also think a lot from the original request could be potentially done via copyable style classes that can include Hype properties and custom CSS.
You could potentially do some of this now with symbols -- you could have a library of symbols in the library, and when dragging them in they could have on load actions that can write out some CSS. (It would only work in previews/exports though).
This would be awesome! Record and store shapes for example, custom buttons and the list goes on... Best part of all it would not add to the program by way storing actual shape as a custom copy but just steps recorded by the end user as if it were to be created from scratch step by step in Hype. Call it Hype Recipes.
Photoshop uses Actions they're just chain of events recorded thats it.