To say this latest revival of the Royal Opera’s Tosca peaks early would be an understatement. The shockwaves rippling out from the brass and timpani in the first few bars set the auditorium rumbling, tumbling the strings into motion. Conductor Emmanuel Villaume seizes his audience and refuses to let go, dragging us in to join the dance of the Sacristan’s sleekly self-satisfied music with its sacrilegious whiff of the Palm Court.

Debussy’s Pelléas et Mélisande is a drama played out in shadow. Shine too bright, too unyielding a directorial light on it, and the delicate dramatic fabric – all unspokens and unspeakables – frays into air. Just over a year ago, director David Edwards and the Philharmonia Orchestra gave us a semi-staging of exquisitely allusive simplicity, leaving the music to fill the gaps between symbol and emotion.

How ironic that English National Opera turned out possibly the two best productions of the year after the Arts Council had done its grant-cutting worst, punishing the company simply, it seemed, for not being the irrationally preferred Royal Opera. And while 2015 has been as good as it gets artistically speaking for ENO, 2016 may well see confirmation of the first steps towards its dismantling by a short-sighted management – for what is a great opera house without a big chorus or a full roster of productions, both elements under threat?

Searing emotional truth has to be at the core of any attempt to stage Tchaikovsky’s “lyrical scenes after Pushkin”. I was among the minority who thought Kasper Holten got it right, with deep knowledge of the original verse-novel, in his first production as Covent Garden’s Director of Opera back in February 2013. Then he had total commitment from Simon Keenlyside and Krasimira Stoyanova as an Onegin and Tatyana looking back in anguish on their youthful selves, and Pavol Breslik to the manner born as doomed, callow poet Lensky.

Dickens’s public readings from his novels were almost as famous and popular as the novels themselves. He would write special scripts that gave prominence to particular characters and that dramatized the salient events of each story; and of all these performances, A Christmas Carol was one of the favourites, his and his audiences’. So what better idea than to turn this unforgettable tale into an opera: an opera for a single singer, dramatizing the story, impersonating all the main characters, being, as it were, Dickens himself with added music?

Much of what follows was included in the 25th anniversary programme for Jonathan Miller’s legendary production of The Mikado at English National Opera. And the show goes on, still dazzling on each curtain-up thanks to the undated feat of the late Stefanos Laziridis’ sets and Sue Blane’s costumes, its routines absolutely classic on its 14th revival. On 6 December it marked its 200th performance, so there’s good reason to wheel out this celebration of sundry Mikados again.

You can forgive a certain amount of scepticism. After his now-infamous Royal Opera debut earlier this year, directing a Guillaume Tell that was heavy on concept and light on just about everything else, Damiano Michieletto returns for a Cavalleria Rusticana/Pagliacci that sounded as though it might go the same way. In the flesh, however – and what work-calloused, life-blasted verismo flesh it is too – the production is thoughtful and instinctively theatrical – as good a new show from the company as we’ve seen all year.

Send in the clowns, as they sing in this palace-of-varieties first act, not for Pagliacci, Leoncavallo’s sole foothold on today’s operatic repertoire, but for the fool-for-love heroine of a sparkling, swooning rarity. Musically, Zazà is a notch above Mascagni and Giordano for orchestral delights, just below supreme genius Puccini, but its admittedly thinly-spread plot ends by being rather remarkable.

An evening of Rameau was never going to be a neutral event. Last Friday all things French became painfully, irretrievably politicised, and while there were no speeches or acknowledgements last night, when Christian Curnyn dispatched the opera’s final ensemble not in fanfares and crescendos but the slyest of diminuendos, it was the perfect response –a Gallic shrug of a gesture, defiant in its charm and wit.

It’s never funny like Ligeti’s Le grand macabre, though it touches on that joke apocalypse’s more nebulous soundscapes. Nor is it obviously dynamic like David Sawer’s From Morning to Midnight, with which its title is not to be confused (there are no transitional stages here, only birth and death). Wagner’s cosmic sweeps don't entangle the banal with the numinous like this. So what exactly is the new opera Morning and Evening?