All those maps and graphs in the OP, hardly looks like a typical stage intro thread.
The conventional wisdom says the GC contenders will finish together again, but I wonder. After watching Froome put double-digit seconds into all his rivals in less than 400 m on the Huy, I wonder if he will try to gap them here. Sure, it's a much gentler slope, but then, Froome is at his best on less steep gradients. He doesn't need an additional 3-4 seconds, and if he were smart he would probably save his energy, but he can't seem to restrain himself whenever the road goes up. Also, if he can gap the others, it will further send the message to be afraid, very afraid, when the real climbs begin. Contador in particular would not want to be embarrassed again.
At the very least, I expect some testing. Seven percent is not an insignificant grade.
Also, isn't the climb after a 4 km, not 400 m, flat stretch?