I wouldn't consider myself a Bond fan, but Brosnan was my favorite. Probably cause I'm a 90's kid and played a lot of Goldeneye on N64.
They're in a tough spot. Go with another white British guy to appease the long-time fans and traditionalists? That demographic is likely shrinking. Will the younger crowds want movie #26 (?) of more of the same? Would casting someone other than a white, British man make any difference?
My guess is that they will try to shake things up in the near future. Probably gear it towards the youth by making it a prequel with some teen/early 20s guy as Bond.