Dumoulin has cracked (a little too literally last time) at every Grand Tour. He was at top form so he managed to eek out (sorry, again) the win anyway last year. I mean, I think on the right course and at the right form he can overcome those losses (no pun intented, really). And he should win more Grand Tours eventually. But these don't seem to be the right conditions.
Froome is coming in undercooked but there's very little indication that the GC race will break open before the second rest day, by which time the Sky musher should be hitting his notes. I mean, the last few kms of stage 9 might potentialy witness some movement but what will likely happen with the rest day dawning is that the Kyri/Deignan/DLC/Henao/Poels Iditarod pack will drag the Top Dawg and everyone to the line at 6.5W/Kg.
But Grand Tours are won on the road and not on forums, so maybe Froome has an off-day himself (as has happened every so often), someone has the gall (and the strength) to take it to one of finest early summit climbers in history on Etna, or we get a truly vintage Pinot performance. Or, though the cycling gods rarely script this kind of fanservice, this is the episode were Superman learns to fly.