I'm someone who literally grew up when the Donner films were released and I believe there needs to be a clean break from them. The Donner film will always be a classic and it will always be an influential part of the Superman mythology. No one can take that away from it.
But the fact is that it will never be 1978 again, and you're not ever going to find another Chris Reeve. It all came together at a particular place and time and it can't be repeated the same way again. Nor should it. If you're going to tell the Superman story again, they have to do it in a different way, no matter how much the filmmaker admires Superman 1 and 2.
I'm sure Nolan liked Burtons Batman film's , but he knew that he had to give his own vision of Batman instead of trying to make a defacto part three to the Burton films.
To be fair SR did expore Superman as a dad , which was new , but unfortunately the film was still too tied to the Donner films to be a new telling of the story. After that there's really nowhere else to go since SR should be the end of a francise not the beginning of a new one.
I think the overall goal is to take elements of what's been done before, while at the same time presenting a new fresh telling of the story without it being an ode to one particular version.