The people who always pass will still pass, the people who fail will still fail.
I believe this has probably come from the top, or pretty near it. No doubt it allows the senior RAF hierarchy to tell the Army we are taking fitness more seriously - and as a 'change' it sends a message that fitness is now more of an issue.
By the way - if anyone is interested (which I very much doubt) I am not particularly for or against it, I will just carry on passing, I merely offer the above as an observation as to why the change has probably occurred!