Koch ain't going to be sent down so, we're stuck with him.
The only scenario I can see that makes sense is sending Wright down (he has been given every chance and has failed) and move Cotts to the 5th spot. I'm not sure it helps Cotts to be pitching an inning here and there, once a week. If he's going to be a future top starter in our rotation, then we might as well train him to be. He can't do any worse than Danny and I really like the idea of having a third lefty in the rotation.
And I don't think Koch has looked all that bad. Yes, that outing against KC was aweful, but otherwise, he's looked alright. If you think about it, he got tagged by Sweeney and Beltran in that inning, who just so happened to be killing all of our pitchers. I'm not a Koch apologist, but I do think it's still too early to jump ship with him.