The Cubs did just fine against RHP last year. LH threats aren't nearly as necessary as overall threats. The Cubs sucked against LHP last year, due largely to players like Jones who were completely worthless against them. But you do need SOME left-handers in your lineup. I'm not saying it has to be 5RH/4LH, or vice-versa. Late in the game against a closer, who in this division are mostly, if not all RH, it would be nice to have some guys from the left side with a little bit of power. I think we need to look at the end result. If you're right handed heavy but your big RH bats can hit right handed pitching very well(Lee and Ramirez can, Soriano doesn't have a heavy platoon split either), then it's not such a large concern. Plus, like Goony said, Pie or Floyd are likely the ones that would replace Jones, and they're both left handed hitters with a sizable platoon split.