Sometimes the late-bloomer, change-of-scenery thing needs to happen regardless. J.D. Martinez's success is not an indictment of the Astros' player development program. And what happens next to Franco won't change the Phillies' failings either way!
Or he could do as well as Dom Brown or Tommy Joseph though I'm not sure that would make us feel any better either.
More likely it will be middle ground, he'll be the same-old competent major league hitter (at least at times) but not enough to get into significant positive WAR.
Either way the people who failed him - even at the major league level but the minors too- are long gone.