He can? His appetite for innings was missing, his previous time out there.
If a guy's going bad, he's going bad. Now, if you put him in the bullpen and tell him to change his approach, "go as hard as you can for as long as you can," in the hopes he'll have better success, well maybe. But then you're not telling him to eat innings.
"You're a reliever now, go hard on every pitch, but still give me innings," is about on a par with "throw strikes, but don't give him anything good to hit" as pitching advice If he could do either of those, he'd be in an asset the rotation.
I don't claim my view is constructive. We now have Colome and Shoemaker both worthy of only mop-up duty. Modern bullpens can't function that way.