I think TJ's criticism is character-based though (it's selfish of him to keep fighting for the win after two stage wins etc.), as is the use of the word 'hoarding'.
The issue is basically that he's both a) extremely good and b) extremely aggressive. In one-week stage races this'll come to the fore more, over three weeks there's more conservativism/pragmatism, and he won't seek to win every stage he 'can' win. At which point, I don't think his 'hoarding' will be too far removed from Nibali '14 or Froome '13, or Nibali '13 – maybe a stage or two more, but mostly because of his versatility.
I'm also not sure if it is a broader trend in cycling beyond Vingo and Pogacar. Didn't last year's Giro have every mountain stage contested by the breakaway, or something like that?