It’s odd, because I really didn’t notice any issues with the mix. There were only a few lines that got drowned out by something else and they seemed to be more or less intentional. I had a hard time with the turnstile interrogation through glass, but I’m pretty sure that was meant to be confusing. And I say this as someone whose hearing is absolutely terrible at distinguishing conversation through any kind of interfering sound. But I also thought that it was intentional on Nolan’s part, in general, to keep the viewer as off-balance as the Protagonist was. I had to stay on my toes and struggle to keep up for the whole film, just like the Protagonist, but I always did. I don’t know, all I’m saying is I loved it.