I personally liked Oppenheimer fine as it was (except the crappy explosion), but I can see why others might not.
I also enjoyed that old Paul Newman, John Cusack, etc one that focused less on Oppenheimer. Fat Man and Little Boy.
Interstellar's plot is about messing with universe time, but the movie isn't jumping around points in story time. There's just the astronaut and Earth storylines with a little crossover, and each mostly moves forwards only. I liked that part a lot actually.