Allow quick and easy translation of content in Visual Editor to other languages via 3rd party translation service. This feature would be charged extra for the amount of translated content.
The idea is to allow a user to run a combination of different templates that the user selected. For example, I might have a template for clearing up the html, another for replacing urls, and another for adding attributions. Depends on the needs, I might combine one with another, and run them in certain orders. This will also avoid making a super long and complicated template.
Integrate Visual Editor with https://pixabay.com/ free images service.
WordToHTML.net could save versions of edited HTML documents with the ability to recover past versions or compare them with existing HTML in the visual editor.
We see that many users create email signatures on WordToHTML.net and we are considering creating a dedicated page to create email signatures with an easy-to-use wizard.