Frustrating stage, Movistar did the most of the work to eliminate Porte and then noone capitalised. Noone capitalised as Movistar continued a high pace to, and up, the final climb stopping any other breakaways (apart from the final one they inadvertently launched). This would indicate that they were either racing for 2nd or thought Porte might come back and be effective.
With 20/20 hindsight we know Porte was fried, Movistar could have taken their foot off the gas and let the games begin. However even at the time all they needed to do was push the pace up until the peak of the third to last climb and make sure Porte had no hope. In this Saxo is equally guilty. This would have been the gamble, chances are this leaves you with only 2 teammates from any one team, and while Froome is vulnerable, so are you, but if you want to win big you have to gamble big, and they didn't.
Instead Movistar hit the final climb with 4 guys soon to be 3, but by this stage tactically all Froome needs to do is attack himself, it was over.
The only real losers were the fans, we lost an opportunity for a great stage, and of course SKY. Movistar worked hard and may have sewn up second. Garmin worked hard and got a stage win, other teams didn't work and moved up one place on GC.