I like this signing. He's not the answer, like a Crosby signing would have been, but he fills a lack we had last season. The need for a power edge rusher. Chassion isn't one. and Landry wasn't either after his injury. He's a guy who can set the edge and might help as a situational interior rusher who might be effective on some of those stunts the Pats run.
So a good start to the edge situation at a reasonable price for a 29 year old. BTW, I do NOT think this means Chassion won't be resigned. My first choice would have been Phillips and would have been fine with the deal he got. But this looks like we are building incrementally. For 20 years the Pats rarely had a dominant edge rusher, yet usually was a top 10 team in sacks.