A quick analysis of the reviews from French critics, who saw “Oppenheimer” on July 11th, can be found on the Christopher Nolan Art & Updates Twitter feed.
Everyone agrees that the film is very dense, perhaps the most dense of Nolan's filmography, but that it remains easy to understand, unlike Tenet.
Ludwig Göransson's score is so extraordinary that the film has been compared to an opera. Technically, the film is outstanding and highly inventive, which prevents it from being a basic biopic.
The last hour is very divisive, but even people who don't like Nolan loved the first 2 hours.
The film is not at all commercial and will have trouble topping the 300 million mark at the box office. Quite cold, no action and lots of long, but brilliant, dialogue scenes. One French critic compared it to “The Social Network”
As for the female characters, everyone agrees that Pugh's character deserved more development. Emily Blunt, on the other hand, is being praised for her final arc.
Cillian Murphy, Emily Blunt and particularly Robert Downey Jr have a good chance of winning an Oscar. But the whole cast is impressive, even those with very few scenes like Gary Oldman.
This is Nolan's most politically relevant film.