While he took longer (attacked later) than both Purito and Meintjes to bridge from the peloton to the Nibali group in Rio, he also distanced Froome, Costa & Kangert (the next three after him). While all three from the peloton was distanced by Nibali, Henao, and Majka, they climbed the whole ascent faster. While we can always second guess if he would have won without his crash on the last descent, I think we can say that he probably wouldn't if not for Nibali's crash too, in any case.
While the whole Vista Chinesa is harder than the main climb of Innsbruck, it was only tackled 3 times and with a bit more flat inbetween. But most importantly, it wasn't really drilled as hard as Igls can be expected to be, with the difference in team sizes. Summa summarum, I think it'll be too much for Ala, but he should survive deep in to the race and then depending on how it is ridden, he can maybe do something (which needs to be before the very last ascent, I'd think).