Pelley was a dime-a-dozen player in NJ who has Brad Mills and Tim Sestito who are essentially the same player. 4th line player who is reasonably solid defensively, can play PK if needed, and isn't a useless player in the offensive zone. No creativity or vision with or without the puck. Can fight if needed.
Fraser is a physical but slow defenseman. Cinder block hands and poor passing. Makes a lot of errors with the puck but isn't bad defensively. At this point though, he's the last thing the Devils need on their blue line with Salvador and Volchenkov already playing the low-mobility, high-physicality roles to the detriment of the team's breakout and offensive fluidity. Can fight if needed.
I'm happy to get Foster, first because it gives a legitimate threat from the defense as opposed to having Kovalchuk being the only real point shooter on the power play. Second, it means Larsson doesn't have to play as much on the power play where he has been a little raw, despite decent production.
Despite how iffy Foster has been this year...the Devils get the only regular-NHL caliber player in the deal, IMO. Fraser and Pelley are fringe NHLers at best I feel and Pielmeier is minor league depth.