I continuously see the point being made that "Lopez is only a #3, do we really need more #3's?" I for one welcome the added depth to the rotation if it means no more trotting out pitchers like Bundy, Archer, Chi Chi Gonzalez, J.A. Happ, Matt Shoemaker, etc. It's a good thing to have solid starting pitching depth...
No doubt Arraez's bat will be missed, but I think his production can be replaced relatively soon by whomever steps up out of Julien, Lewis, Lee, Martin.