"they should reboot Bond to be MI6s top agents 'identity' and not just a single person"
I can go with this. Particularly if they cast Gillian Anderson as James Bond without changing the name of the character.
The main issue with casting Anderson is she's 48 this year. This has nothing to do with her being a woman and everything to do with the role. Roger Moore's later movies were made when he was in his 50s, and he was something of an embarrassment in them. I wouldn't want Anderson to suffer the same fate.
OTOH, if they want to make an adaptation of Brian Michael Bendis's excellent period spy comic Velvet, I think Anderson would make a very good Velvet Templeton. For those unfamiliar, the central premise of the book is "What if Miss Moneypenny was a retired 00 agent?"