Hi @johnny.
tep 1: Global Configuration > Site Offline > YES Step 2: Coming Soon ON > Add background image > Save > Coming Soon OFF > Save
I agree with you that this is not intuitive. Nevertheless, it is not so difficult. And compared to the standard Joomla functionality, is much more flexible for creating any appearance that a designer draws.
I work a lot with designers who draw as they want and sometimes rather complicated things, for the implementation of which through the standard functionality of Joomla, it would be necessary to really edit PHP.
In the case of Helix, PHP editing is not required. I don’t know who gave you such a stupid advice.
The level of webmasters using Helix is very different. There are beginners and there are professionals. The software should strive to satisfy the requests of both groups, but not only beginners.
As a professional, I exclusively appreciate this Helix functionality. And I would not like any changes in this.
For many years of practice, I used many templates. And in recent years I have been using only Helix. I believe that Helix is the best in the market, thanks to its simplicity compared to other framework-templates and pure understandable code.
Sometimes people hate what they do not understand. But when they begin to understand, they begin to appreciate.
For intuitiveness, it would not be bad just to add an additional option like "Offline mode" along with existence, the "Coming soon mode".
Nevertheless, I am not an employee of Joomshaper and cannot affect the solution of such issues in the development of Helix.