Hi, the first two things are worth considering, the last one I’m afraid isn’t. Publii is a CMS, not a page builder with a built-in CSS framework, which gives developers a lot of freedom in creating fast and lightweight sites.
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yes, I know publii is not a page builder and it is good that way. However, the tiny editor has almost “all you need” except for 1 and 2. If a full integration in the editor is not wanted, maybe there is a way you could develop a resources area, where you and other developers offer code solutions for specific tasks!? e.g. sections with full width-background images etc.?!