Utley was an elite player. Wasn't a full-time starter until 26, elite player from 2005-2010
Howard had an elite season, but was a late bloomer who never matched his early production (didn't make the majors until 2005, 25 years old, full-time starter the next season), by 2008 he was an average starter.
Burrell #1 pick, made the Show at 23, best season was in 2002, never an elite player, by 2008 he was a slightly above average LF
Werth, made the majors at 25, injuries then derailed him until age 28, was a very good but not elite RF in 2008, strange career, fell off at 32-33, then bounced back with top solid seasons at 34-35.
Rollins, starter at 22, peaked from 25-29, in 2008 he had his last top season, a very good but not elite SS
Victorino, starter at 25, peaked from 26-30, a very good but not elite CF
Hamels, starter at 22, peaked from 26-30, bounce back year at 32, wasn't an elite SP in 2008
Lidge, became a ML RP at 26, two very good years at 27-28, bounce back in 2008 at age 31, a half bounce at age 33.
Thoughts:
1) Utley was the only elite player on that team, Lidge had an elite season for a closer but only as a 1 inning guy
2) Most of the key players peaked between 26-30, so were at or near their peak that season - 5 good to very good starters
3) You don't have to have great players at every spot if you have a solid core (Feliz and Ruiz were below average as starters)
4) A deep bullpen (Madsen, Durbin, Condrey, Romero) can allow you to survive a medicore starting staff (Moyers was a solid #3, Myers & Blanton were barely above replacement level - Kendrick and Eaton started 49 games and were well below replacement level).
I think the Phillies are building up a solid group of starters, though it would be nice to come up with an "Utley" who can give you five elite seasons when this group is peaking.
They're also going to have a deep starting pitcher group, now they just have to build a solid bullpen to go with it.
The difference a decade ago was the Phillies might come up with one or two young pitchers a year, and if the kid broke down, they had to scrape by with some mediocre veteran pitchers.
Klentak is building safety with numbers, when this team is competitive hopefully Lehigh will have 3-4 legitimate candidates to step up when the inevitable injuries occur.