Unless the Flyers get a legitimate top-pairing defenseman,* I would want them to stay away from high-price, multi-year FA signings of Dmen. With actual, honest-to-goodness legitimate impact prospects on the verge of making the team, the Flyers need to preserve some flexibility in their D ranks. They have 5 signed (not including Pronger) for the next 2 years. Coburn, Schenn and Grossmann all hit FA after the 2015-16 season, and Streit and (thankfully) Pronger the season after. That's a lot of D position and cap space solidly tied up for the next 2 years.
It's near unanimous that we hope/speculate that Grossmann gets moved. I am leery about how simple it will be, with him carrying a $3.5 million cap hit for 2 years.
* I do consider Edler to be a legitimate top-pairing Dman, in the face of many opinions here to the contrary. This is just in case anyone ponders my posts in favour of a move to get Edler.