Man, a lot of people have weird reasons to be down on this film. Olivia Wilde is a fine actress, but it seems to me he only reason people ask for her is because she's hotter than Anne Hathaway (as if Anne Hathaway isn't gorgeous herself). Because, ya know, Catwoman's only role is to be sexy.
Bane's mask is iconic, Bane without a mask is not Bane at all. We've still only heard, what, 2 lines of his now? I doubt his voice will be hard to understand at all. He may not even talk that much, at least not NEARLY as much as the Joker.
And to the guy who said Bane is Russian, no, in the comics he's from South America, though I forget which country. Here he's British because Tom Hardy is British. Again though, it's hard to tell exactly what he is from his 2 lines.