If we're going to have a reliever be the "dedicated closer" I'd as soon it be knebel as any of the other guys. I certainly agree that Hader, Jeffress and Williams are better relievers, but they are guys that I want coming in during the "true" high leverage spots that get you TO the 9th. Knebel is still good enough to get you 3 outs in the 9th without "blowing the save", 85% of the time, which is about all you can ask for if you're going to have a dedicated closer role. That said, I'd be happier if they ditched the closer role, and if one of hader or jeffress was available and it's a 1 run game in the 9th against the 3-4-5, run them out there instead of knebel. But, considering they are pretty free with the roles outside of that 9th inning, I'm not sure that would really add up to more than 1 extra win the rest of the way (unless Knebel goes full Turnbow after the break).