Ruben Amaro, Jr. might be able to position his team toward contention again with some smart off-season maneuvering. However, expecting the Philadelphia Phillies to create a Boston Red Sox-like worst-to-first turnaround next season isn't overly realistic.
Ben Cherington was able to take his Boston team apart in the summer of 2012 because Magic Johnson and the Los Angeles Dodgers were willing and able to accept his castoffs. While the Dodgers' decision helped the team return to the playoffs this year, the Red Sox clearly were the winners in that massive trade.
The payroll flexibility Cherington gained, as well as a managerial decision he made, allowed him to create the current World Series contender. The St. Louis Cardinals are hardly pushovers and could win the 2013 'Fall Classic'. But, the point has been made. Rebounds can occur in short-order under the right circumstances.
Amaro has stated on many occassions that the Phillies still have enough pieces (think Chase Utley, Jimmy Rollins, Cole Hamels and probably Ryan Howard) to make another run, as long as everyone is healthy and some new parts can be added. That theory is extremely optimistic, though not totally off-base.