This is a big one, but how awesome would it be if Wix released a Website Building Software tool that allowed you to create a website, have access to local files, and be able to export them into your own host.
I would pay x2/month more for this. Wix wouldn't lose customers, infact they will attract many new customers, especially a large chunk of W0rdpress users, and certainly wouldn't lose Wix any sales. It will save Wix money since they wont be responsible for hosting as many websites, and would remove their liability to moderate websites.
To emphasize, this would be best for EditorX, not Wix itself as I find this userbase wouldn't really be interested in this.
Win, Win, Win, Win.