Turbine - I accept 'weather' was a factor, otherwise the pitots would not have iced up! Moderate turbulence should NOT cause an accident.
What your table of routes shows, interestingly, is that 447 diverted the correct way - west, where turbulence appears to have been 'moderate' which has NO EFFECT on aircraft control. In addition, a 12 degree left may well have placed them in the same clearer airmass that the LH found (at 10 miles).
But it all proves very little, except that going east appears to have been the worst decision, and the further east you went the worse it got. The 'radar' quote is a sensible action by AF (which of course they should have taught from the beginning)
Still no-one can explain the reason for the bizarre pitch programme these aircraft appear to have. I would really like to see the RH stick trace (assuming it is recorded).