Pretty much the point I was exploring in my post 976
http://www.pprune.org/7677549-post976.html
Even relatively small changes to the spec CAN have disproportionate effects on operational effectiveness. The only way to find out is to re-run the trials using the new parameters. I cannot (and am not) saying that the aircraft no longer meets our requirements, I'm saying we don't know whether it does or not. But I would be very surprised, given the magnitude of the downgrade, if there weren't a huge change in overall effectiveness.