Major UFAs don't win cups with the team they sign with. Hossa with the Hawks in 2010, maybe Tavares will have a chance over the next couple seasons. But other than that the major UFAs just amplify their team's cap issues.
Salary isn't our issue, we've already shed nearly $8 mil with Muzzin and Pearson (considering Hagelin is UFA).
Our problem is that we don't have a bunch of quality young players who we need to make salary cap space for. Our young player depth is terrible and signing Stone isn't going to fix that.
If anything, the Salary Cap is an advantage for us, we can retain on Martinez, Toffoli, Hagelin, Lewis, Thompson, Kovalchuk to help competitive teams fit them under the cap and get better value out of them. The retention will be off the books by the time we need the cap space back.