I think Porcello for Cespedes is a head scratcher until you realize the times are changing. During the steroid era, pitching was a scarce and precious commodity. Today, power hitting is the scarce commodity. This year's major league .700 OPS is the lowest since 1992. During the steroid enhanced era from 1996 to 2006, the majors OPSed .762.
Cespedes is a rarity today because he has power. There have not been many power hitters available this winter.