Thoughts from one person in the UK who has a passing interest in politics....
I haven't actually seen the documents myself but it is not exactly a secret that Tony Blair left office with a thousand knives in his back. The "curry house coup" is another variation on this theme, even if it has no basis in reality.
The bottom line is that Blair had to go. Therefore, the most surprising thing that could possibly be revealed is not that any big names were involved in a Julius Caesar style conspiracy, but that they actually needed to go to the bother. Blair was a full blown compulsive liar by the time he stepped down and if he didn't know that it was over without the help of being pushed, then it is a sign he is so vain that he actually believes the rubbish he comes up with.