I do overall like the new UX.

I often need to change the author field from "double field" to "single field" (or rarely, vice versa). The new location that puts it under a hamburger menu makes it extra annoying since its now an extra click (twice the number as before).

I think the actual fix is to provide some kind of "default" so that the imported name matches my preference. Alternatively, I wish there was a way to select a group of sources and mass change _all_ names in _all_ sources.

That said, without either of the above, I mildly preferred the old single button approach.