One thing I don't really get is why teams like Italy, Spain or Colombia didn't make the race harder early on. That move with Nibali, Uran and Landa has a very real chance to stay away if the peloton is more decimated while the final climb was never gonna be the spot where riders from those countries were gonna take the win.
In a way this was kinda similar to the old LBL course where the point to attack for the climbers wasn't RaF, but the false flat right afterwards. When a small group of the better climbers emerges, everyone is looking at each other and you can immediately get a decent gap if you attack in the right moment. The Nibali/Landa/Uran move was a bit like that, but as the peloton wasn't thinned out enough you didn't have the looking at each other part, and that's exactly what they would have needed.