here's an in-depth scouting report on Keaton:
assets: great skater, strong as hell. he has all the physical tools you want in a defensman - i mean all. he's huge, he can hit like a truck, he can skate as well as almost any d-man in the nhl. from time to time, he'll skate the puck all the way thru the neutral zone like Bouwmeester used to do here....because he can do it.
flaws: he has very little confidence in his puck skills, so while he can skate thru the neutral zone, he rarely does. he also is not going to be much of a contributor in the offensive zone. the "hockey IQ" just isn't there for him. no vision, will never play on the PP.
he doesn't really excel at anything in particular...yet. he can hit like a monster, but rarely chooses to throw them (lack of confidence). he's not afraid to block shots, but isn't particularly good at it (not bad, just not an "expert", per se). he's not bad at moving the puck up ice, but will also turn the puck over from time to time. his positioning isn't bad, but again, you'll see him make a mistake from time to time. he'll hit, and hit hard, but he's not really physical (aka: he doesn't have the chip on his shoulder like a Gudbranson does...not "mean" to play against). He'll fight, but he's terrible at it.
Ellerby, ever since he was drafted was considered a "project" and really still is to this day.
in the end, what you can expect is a usually solid-dman who will leave you wanting more. he'll be a solid 3rd pairing d man for you guys, for now, and i could see him growing into a really good 2nd pairing defensive dman if he can gain a little confidence. the best player i can compare him to right now is a less physical version of Luke Schenn. (both can hit, Schenn just has the snarl Ellerby lacks)
Schenn cost the Flyers JVR. Ellerby cost you guys a 5th. great deal. Hope Keaton does well for you guys.