He's a good grinder that can forecheck well, hits a good amount, plays a lot on the PK (top PK forward for them with Cates) but he's a very average offensively. I'd be very careful spending a lot on that kind of player as well but he'd give us a pretty solid boost in terms of physicality, energy and forecheck.
As for Walker, he's pretty much a solid mid pair defenseman. He's 2nd in D scoring for the Flyers with barely any PP time. He PKs a lot and his defensive metrics look great. He'd help a lot defensively and add some skating to the defensive pairings. For my money, him and McCabe would make a great pairing.
We certainly aren't getting enough scoring from the backend so Walker sounds interesting but i think we need somebody who can put up some offense at 3C, our bottom 6 is killing us and it makes our scoring to inconsistent imo