Hey Colin,
Just so you don’t feel ignored (since you bumped it), I just wanted to say that the devs watch this forum and use it to help guide development of new features, but it’s usually by the # of votes and no one feature is guaranteed to be implemented (more details in How DatoCMS Feature Requests work).
Personally, though, I love this idea. It reminds me of the customizable layout options in Wordpress’s Advanced Custom Fields. I hope more people vote for it! Would love to see it implemented, personally – I only work support, but if I could add new features, I’d do it myself 