GS turned the 2015 finals around when they went to their bench(Iggy,Lee)
GS had the cavs down 3-1 in the 2016 finals becuase of their depth and bench.
What happens if Durant/Green gets in foul trouble trying to guard Lebron ?
But that was with a damn near useless starting SF in Barnes. Barnes did some ok work on defense, but the Warriors went up 3-1 in spite of his poor offense.
And its not like the bench this year is bad. They are starting to develop some depth. I don't see where this years bench is dramatically worse than last years, especially now that Clark has grown into his role.