I’ve just started building a few sites and some things that i require would be

1. Custom Post Types, the ability to pull from different post types, and taxonomy using Layout Editor

2. Nested Layout options, have a 1/3 & 3/3 inside a 1/2 if you want to have an image aligned left (i know it can be done using text field, but this way would be much easier for my clients)

3. Ability to add a custom class or ID to each element in the layout builder

Also, 4. When i press enter on my keyboard it exits out of the editor, can we somehow map that to the save button in the editor?