The ability to hide a body from the main screen. Select body, and a simple Hide (eyeball) feature pops up in the toolbar.
When working in large assemblies having items in the way means not being able to zoom or access other items. This means having to navigate the filing system created in the items menu to simply hide that body, then going back to get to the body you want to modify.
I don’t mind having to go back to a respective folder to unhide it. Would just help speed things up slightly to not have to do the process repeatedly when a simple icon function would do.