The Cubs' bullpen strategy this offseason has been kind of interesting. All three guys they've signed/targeted have been older (Fujikawa is 32; Lim and Grilli are 36), and don't have the track record to demand a real long term deal. There was also some talk that they might be interested in Mike Adams, I think. It's a small sample of relievers...but I wonder if they feel like typical aging curves don't really apply to relievers, and other teams overlook value signings because they're expecting a drop off like you see from starting pitchers. Maybe age is the new market inefficiency in the bullpen.
Also, it doesn't really feel like it, but the Cubs have been one of the more active teams this offseason. They've brought in Baker, Feldman, Fujikawa, Navarro, Schierholtz, and now Lim. They've also brought back Stewart and Camp. They haven't made the headline-grabbing moves like the Blue Jays and Dodgers (and certainly won't see as much improvement as those teams)...but they've turned over roster spots just as aggressively. They really have done a good job adding the secondary pieces this offseason...now if they could just find a couple significant players (a mid-rotation starter, or a surprise upgrade at 3B/2B/LF/RF/CF), this could end up being a surprisingly respectable non-contending team.