I've put a lot of hours into Diablo III. A tremendous amount of them in fact. Enough that I could notice a problem with a port of the game more or less immediately. I'm happy to report that I've so far seen very little in the way of differences with the Nintendo Switch version.
Controls work beautifully; No noticeable downgrades; Console menus are amazing
Local multiplayer problems persist; Portable mode gets cluttered; Town portals act weird sometimes