I’ve gotten around this with an admin stylesheet in my theme that has a pretty messy mix of floats/clears/borders, along with some JS to match the heights of divs that are floated next to each other. It’s super ugly (on the code side), and hard to maintain when I add/remove/move fields, particularly when conditional logic is involved. Not quite sure what a good interface for it would look like, though.
Welcome to the Advanced Custom Fields community forum.
Browse through ideas, snippets of code, questions and answers between fellow ACF users