There's a bit of a worry that this observation could be true.
With the offense needing to string multiple walks and hits together, there is a higher premium on home run hitting--or at least slugging--in playoff games. This was a topic of discussion at the trade deadline about the need for another power bat and concerns about Ortiz being asked to be productive on offense. This Cubs series is a small sample size, but it is a group of games against a very likely playoff team's pitching staff. And playoff series are nothing but small sample groups of games.
Maybe some of this changes when Chourio returns to the lineup in place of Perkins, who is a good 4th/5th outfielder but not someone you want as an everyday starter. But the shortstop position has a good probability of continuing to be a weak link in the offense chain.