Thanks for the feedback, Justin!

You're absolutely right, the current custom selector for the list-item width is not very intuitive for regular users, and I'm thinking through an improvement to the feature. Perhaps utilizing the new pattern in 5.9: where you have some options to select from but you can still toggle a custom option to set your own specific size.

I definitely want to make more adjustments available within the list-item settings instead of simply providing a jump to the parent block. That was really just a quick solution.

Looking forward to developing the block more! I have a lot of ideas. :)