yeah it's strange, if you are building a CMS in AI times, I think you would want an llm integration first. Not a UX clone of WordPress. The UX of WP is sort of a historical clutch not a plus.
I'd go the other way. Have less stuff. Just a text box, markdown, insane support for mermaid and everything. Dump the "blocks" of wordpress etc. Too confusing and fiddly. Maybe have AI assist to help with styling the rendered page a bit.