I liked Folin as a depth defenseman. Not very good with the puck, but he knows it and doesn't try anything fancy. Very strong and engaged physically, knows when to pick his spot for a good hit.
As many other said, Benn probably looking for the best offer as a Ufa and I don't blame him. He just came off his best season and he needs to cash in at almost 32 years old. He's better then Folin with the puck, he's a better passer and has more vision. His shot sucks tho.
Now, with the current depth on the left side, Kulak really needs to be re-signed. He occasionnally had brain cramps, but his play was solid from mid season on. Even if we sign or trade for a better LHD we still need to re-sign him imo.