A new graphics library with GPU acceleration? That's a pretty big deal (migrating from Cairo to Skia). No wonder they renamed 6.5 to 7. I'm one of the weirdos who uses LO for wargaming maps and other graphics, so it's kind of exciting to see this.
I also kind of started doing graphics with libreoffice, even though that did not exist back then. But ... I switched after I saw, what programs can do, that were designed for graphics ..
But if you are happy with it, why change.
These days I really like the simplicity of LO Draw, for example. Any time I need a new map for a campaign, it's really easy to just add a new page to the main document. And there are zero licensing issues to track along with the many others I already track. Plus the principles of design work the same, so with this "one simple trick" (25+ years of illustration and design experience) I can get superior graphics quality results with the same tools that others think are not so great.
There's some nostalgia in there too; I used StarOffice from the moment I heard it was free. Back in the '90s that was kind of a big deal to a poor university student.
Don't even try to get him to use a CAD or vector drawing software :D
I can't imagine what such a map would look like, or how you would even go about creating it.