This is perhaps one of Shakespeare's more interesting plays, if you will. In comparison to Macbeth it isn't quite the walk in the park.
I think conceptually it enables the reader to see that characters can influence characters to such a degree that the original traits are masked and changed. Tragedy in this play is definitely a main component - and a great emphasis that perhaps the villain doesn't always find their true defeat. In a way, wasn't the "villain" successful? He lied to everyone and pretty much killed whomever got in his way.
The Berlioz version was first presented at the Théâtre Lyrique on 18 November 1859 with Viardot as Orphée, Marie Sasse as Eurydice, Marie Ernestine Marimon as L'Amour, Mlle Moreau as L'Ombre, and Adolphe Deloffre as the conductor. The sets were designed by Charles-Antoine Cambon and Joseph Thierry, and the choreography was by Lucien Petipa . (The seventeen-year-old Jules Massenet was the orchestra's timpanist . During the rehearsals Berlioz had complimented the young player on the accuracy of his tuning .) The production was a popular and critical success, filling the house every night, and was given a total of 138 times by the company.