I agree completely. After playing with Elementor, I definitely miss the ability to undo everything since the start of a session. In Oxygen, this would really help to give the freedom to experiment with layouts and styling.
In Elementor you have 2 types of back-history - Revisions (all the saves provided by WP) and actions (ability to undo your actions in the same editing session). It would be great if O2 provides these as well, as the current state is devastating - changing paddings with "apply to all" requires that you first remember the old values and then go and edit all of them back - not nice 🙂