Can I make edits in WordPress editor, and have those update in elementor?

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Depending on what you are referring to as changes, yes, you can make changes to your text, insert images, etc. and the updates will show in Elementor. You may have to still tweak certain things in Elementor to get them the way you what, but the Elementor plugin does pick up the changes. Not sure why you would want to do it that way though and guess never experienced myself having to do it this way. Also, if you have that much content on a page that you are finding it easier to use WordPress to make the changes than elementor, you might want to break your content into smaller chunks. Think of it this way, the Elementor plugin is like a blank canvas with tools, and your theme provides the content. Then Elementor takes that content, uses its tools to paint the picture (for lack of a better term) on to your canvas (page)

The switch loader setting has nothing to do with what you are wanting to do, but rather loads a different configuration of sorts to over coming multiple server configurations that could cause Elementor not to function properly. I would spend some more free time working through your workflow processes and you may find a better way to do it than what you are doing now.

Cheers!!!