Three challenges:
- Im fairly sure thumbnails are not serialised here. Feel free to confirm. That could be overcome by enhancing the sidecar plugin.
- when I last looked at this the structure of the page did not permit low risk overrides isolated to a leaf template. Generally we don’t want to override the whole page which might cause breaking changes or mask feature updates from core. A PR to core might help here …
- Space?
Feel free to submit required PRs