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Database dumps are available here if you are interested: http://libgen.rs/dbdumps/

libgen_compact_* is what you are probably looking for, but they are all SQL dumps so you'll need to import them into MySQL first. :/

the dumps are not enough, one has too scan the actual file content to assess the quality

are you alone in your analysis or are there groups who try to improve lg ?

Such efforts have been made in the past but every time ceased at some point for complexity. A workgroup can be made to tackle it, though.