To improve indexation by google a simple user controlled meta tag would have helped a lot

You can add the tag to a custom s2 layer. Mine, with the tag included: https://www.dreamwidth.org/customize/advanced/layersource?id=116552&fmt=html

Does LJ give a specific spot in a wizard to add the tag to that DW doesn't? (I haven't used LJ in six years, so I'm sort of out of the loop).