The team is a very strong team. As for racing tired, apart from Ian Stannard (who didn’t ride the TdF) they’ve all ridden no more (and in many cases a lot less) than they would usually before the Vuelta….. with the exception of Sergio Henao who is in his first year racing at this level.
(check out CQ rankings number of race days and no of KM raced).
I think Froome could do well. Contador might not come back as good as he was, not from using a different butcher, but actually just not being too race fit. He could do very well come the World Champs though, should have just about found his legs.