Thanks for all the awesome feedback. It’s all been really interesting.
It’s worth noting that the Online CMS Editor is essentially separate from Elements. It could be used to edit any set of folder of standard Markdown files with frontmatter on a server, this makes the system very flexible and powerful!
You also don’t need to keep your Markdown files in Elements. Once you’ve set up your site, I’d recommend simply managing your Markdown files online via the CMS Editor.
We’ll make some more videos to show this workflow and explain how we’d recommend managing content. 
This is an Elements app issue, not just a component issue. It’s not something @ben can change for the current CMS Components without @tpbradley making changes to the app itself…
We have big plans to improve the workflow in the app for setting up and previewing Markdown content, but one step at a time. We’re currently working flat out to ship the first version of the CMS Editor, along with third-party access to the Store!