Okay, first of all, you said that the 4th line is supposed to be kids who don't have top end talent. Both Prust and Boyle are younger than Orr/Betts/Sjostrom and you say a few lines down that Boyle has limited upside. How is having limited upside different from not having top end talent? Also, they are most definitely hitting and keeping pressure in the zone, more so than any other line on this team.
Secondly, Voros and Brash were going to bring in anybody? Am I missing something here? I don't see how or why anyone would give us anything for either of those guys, let alone a top 6 offensive player or a top 4 D man.
At the end of the day, this line isn't making or breaking the team, but I think that they are a definite upgrade over last years fourth. Everyone seems to be making much, much more of Betts than is warranted. As someone stated a few posts back, every team but the Flyers passed on the guy and even they made him tryout. The "we should know our players best" argument doesn't hold much water with me, I agree that we should, but letting Betts go didn't ruin this team by any means, we're much in the same place as we were last year and our penalty kill is still one of the best in the league. We knew him - we knew he wasn't irreplaceable or really worth holding on to and we were right.
People like to think that every player has some value and if you add enough up you can get a decent player.
I really couldn't care less either way. There are so many other problems that this team has, it really doesn't matter much about the 4th line. They really haven't hurt the team, but they haven't really helped either. And, with the exception of Boyle--who can at least kill penalties--they have such a limited skill set that they are even less versatile than the other 4th lines the organization has put together since the lockout.
In fact, the only thing they really show is how poorly this team has been constructed. Especially given the fact that Voros and Brashear still have another left on their respective contracts.