We should work together to contribute our custom changes to the HTML5 template to be included in the vanilla version. Some custom features could be included as optional toggled features in game.project.
Developers will have total control of HTML because they can create HTML from scratch.
In addition, Defold Editor doesn’t have to have HTML customize functionality.
That as an option would be useful. But you would not want to not include an HTML file as many people who are beginners would get stuck when sharing HTML5 builds on sites like itch. It has to be super easy for them.