While more accurate data and reliable statistics certainly paints a more complete picture of things,
at the end of the day, I think most readers will just look at the ratings, maybe the followers, and ignore the rest.
A different route would be to include historical rating charts (monthly?), which could show how public opinion of a particular series has changed over time.
i.e. An absolute trainwreck ending would show a nosedive at roughly the same time the chapters were uploaded (assuming no massive in-advance spoilers).
But this too may be much more effort to implement than it's worth.