It really depends on how much he got paid and given that he really is a 3-4 OLB and the Eagles are a contender it probably would have cost a lot more to get him to stay here. Fact is he was never the right fit for this team. And given what pass rushers with like 4 sacks were getting yesterday, I doubt it was all that cheap of a deal.
Plus, even if they had Baun on the team they still need a big upgrade in the pass rush. Baun looked good at the end of the year, but who knows if he can sustain that over a 17 game season and it's a lot harder to get him pass rush opportunities in our scheme than in the Philly scheme. They need to take that money and start to upgrade the pass rush and find one or two more in the draft.