Web Export is at version 3.4.8 but really it’s at version 1.0 in the big picture.
Some of the breakthroughs came from building a site myself. They call it eating your own [dog] food.
If you’d like to send me your project I can attempt to wire it up and send it back to you. Sometimes it helps improve the project and you end up with a project you can export as a page / site / slideshow.
Post it here or send it in a private message. This is for a limited time.