Matt Moore's FIP is so high because of his out-of-control BB/9. But he and Hellickson really aren't in the same universe production-wise. Archer is unproven, Cobb is inconsistent.
That doesn't suddenly makes them a pumpkin, but they're clearly a tougher team in the playoffs with Moore than without him. There's no argument. We'll see what's the actual extent of his injury.