For an English translation of the original French report on this event, go to the very first post of this thread, to the AvHerald link. On the third paragraph where it says "final report" it is a link to an English translation courtesy of the BEA.
There was a time in which I used to go around 8 times a week to this airport. From the Metars on AvHerald, it looks like the typical frontal weather moving from west to east. The TCUs pass over Paris and continue on their easterly movement, and start to "party" 10 or 15 miles east of Paris due to the excitation of passing over the town. This is the area where the approach is done to Orly, and often one has to endure some turbulence and ask to avoid the worst of it. Often it is clear skies to the west of the airport, but to the east, on the approach path, it looks ugly. For sure some turbulence was likely at the time, but I doubt that they had a Microburst on top of them, or ahead of them.
It seems that now the machine decides and orders a Go-around when its inbuilt parameters are reached, instead of just advising of possible Windsheer ahead. "GO AROUND, WINDSHEER AHEAD"