I just won a World Series (94 wins in regular season), while leading the league in errors and plus plays, and having NO minus plays during the regular season OR the playoffs (except for a few from my pitchers). In the past, I've sacrificed some offense for better fielding players and have missed the playoffs.
So I think it's a crapshoot - sometimes, range can help, other times, I think it is overpriced.
My team is still available to view since our playoffs just ended last week.