Abols, watching him he's for real, not a great player but solid bottom six center who isn't as offensively gifted as Frost but bigger, smarter. Better speed than I expected. It's not like Frost was tearing up the league, on a 29 ES point pace which is fine for a middle six center, but nothing special.
Richard is a scorer, like Farabee, not as good defensively, but again, we're not talking a huge dropoff simply b/c Farabee wasn't playing that well. Richard has scored at a higher rate.
They're downgrades, but not that far down b/c the starting point wasn't that high.
Now in the longer run, Frost's replacement isn't on the team, and unless Pelletier is a revelation, Farabee's replacement is going to be Barkey, Bump or a draft pick.