To date, there have been 24 Bond movies. Why not try something different? Hell, there was a rumor about casting a prominent black actor last year (Idris Elba was the name thrown around), and that could've been something unique and different. I don't see the problem here.
Agreed.
007 as a character is supposed to just be the agent identifier, not a singular specific character archetype or gender. Personally I'd love to see Idris Elba fill the role but I wouldn't mind seeing Blunt either.