Morning FBB,
Can't really speak for AF but while i was flying for KLC/uk out of ABZ this topic often came up. I 'doubt' that KL would bring the departure time of 'red eye' forward purley because of the voulume of traffic into AMS at that time of day. As you will know that flight does get hit with some horrendous ATC Slots from time to time and i don't know if bringing the STD forward an hour would help that. I am just speculating here obviously. The other thing that may affect that would be the crews hours. As there are no longer any ABZ crew i don't know how they operate their rotation so rest may be a issue.
Anyway that's just my opinion.
Rooster
