Absolutely, a big thing Jurgen has done is take big chances and by adding players like Johannsson, Green, Johnson, JAB (although he has a ways to go), etc and inject some new life to this squad and just expand our previously shallow pool of players to select from.
Relying on MLS/American-born players, is basically what Bob Bradley would be doing; essentially banging his head over and over again on the same door, hoping to uphold mediocrity.
With what Jurgen is doing, and looking for naturalized US players, he's able to boost the over talent of what we have now.
I mean
@psk2310's criticism of the MLS says alot to where the bar is set for American-born players, its pretty obvious that we needed to look elsewhere for an infusion of talent; at least in the immediate future.
The development of our domestic, American-born players will take a bit since its not like we can just get the Brad Evans', Demarcus Beasley's, Clint Dempsey's, Jozy Altidore's, Omar Gonzalez's, etc of America, and simply just ask them to take the next step become instantly better players.
That's just not how athletics work... hell even life doesn't happen like that unless you hit the powerball
The growth and development of American players will be noticed in the next 8-10 years. And thats where I'm pretty excited having Jurgen helm that and bringing in great outside influences like Berti Vogts and having Tab Ramos around to help mold and advance what the standard of American-born players will be.