Some of those Post writers are really bad, Davidoff and Kernan specifically, their columns often seem entirely based on the single game the night before.
Anyway, I'm not sure they really had a great chance to dump CC before right now, he's obviously getting paid a ton and they didn't know how Nova would come back until he actually did. CC looks pretty clearly like the 6th best option right now (maybe 7th if they gave Bryan Mitchell a shot), but is Warren the starter/CC the reliever or on the phantom DL a better combo than CC the starter/Warren the reliever?
Warren can singlehandedly transform the bullpen into an area of deep strength, especially once Miller is back. Shreve/Wilson/Warren/Betances/Miller is a very nice fivesome, so like I said the other day, I'm glad I don't have to make this decision.