Hey @mbpz,
I’m sorry but there’s only a little context in your post.
You said:
What exactly would “help” the editor users? Is it the builder’s layout? If so, you can customize your Workspace. For example, you can move the builder’s controls down the screen so instead of showing on the side taking up horizontal space which is annoying on a portrait monitor, your builder controls would be at the bottom so you can see more of your content.
If you’re referring to the actual layout of your site (frontend), there is no such thing as 9:16 layout because you cannot limit your content. You just set your Site Max Width in the Theme Options then let your content flow (no specific height).
If that doesn’t answer your question, please provide more context.
Thanks.