When Nesta, Di Vaio, Ferrari and Rivas leave the team, the Impact will obviously go get more similar experienced Serie A players. Maybe younger this time, kind of like Pisanu.
It will be tough to get full-time serie A players.
Pisanu was a reserve player. That's what they can get.
What would I look for? 26-27 year old stand-out Serie B players or average players on relegation teams. These would be players who would be open for a move, but actually play. Also, if you're pigeon-holed as a serie-b player, there may be upside since you never got a shot will a major club.
If I were the Impact, I would have tried to pillage AS Lecce last year. This team not only was relegation, but got in big trouble with match-fixing. This resulted in a demotion to Serie-C1. You know players are itching to get out. Plus Southern Italy is poor, especially right now, so going to North America may be an enticing option.