Look up and down the Phillies roster and there are only a few players who stand to play key roles in the future contention of this ball club: Maikel Franco, Odubel Herrera, Aaron Nola, Jerad Eickhoff, and Vince Velasquez. Regardless of the progress of the rest of the club, if those five names meet or exceed expectations, the 2016 season will be an overwhelming success.
That in no way suggests that the performance of the rest of the squad is irrelevant. Pat Gillick showed with his construction of the 2008 World Champs that role players play, well, a key role on any team.