Hello Seab,
It's good to read that you liked QuarkXPress web features.
QuarkXPress provide you a basic platform for creating webpages. However, if you wish to edit the HTML code any text editor can be used while the webpage is saved as .HTML
Let me add your request "there is no way back to work on the page again in Quark " to the wishlist. We might be able to provide this feature in the next product release.
Warm Regards,
Gaurav Krishan