Some of the posters on the Minnesota thread haven't run the numbers closely enough. Yes, Minnesota will lose 8M in cap space for next year, but 4M of that is Rask's contract. So, 4M of space needs to be saved. The present roster has 1.8M of cap room this year, and the cap is supposed to rise by 1M for next year, so we really are probably only needing to save 1.5M of cap space.
Greenway is not, in my opinion, the right place to do that. His value is intangibles. In other words, that line he plays on is a total beast, but it is definitely a 'Sum is better than the parts' situation. It's exactly the kind of line that a good GM will keep together. Greewnay might get a 1M raise, but I doubt that, even. Foligno, on the other end of the line, is probably slightly better, and he gets 3.1M. That 1M raise can be managed by Minnesota. Plus, if you let him go, you only gain 1M in cap space. That's too incremental.
The wild card here in St Paul is going to be Fiala, not Greenway. If he all of a sudden starts playing lights out, then it gets tough, because he's going to worth more than his present 5.1M, and then Greenway is perhaps more likely to disappear from here.