Here's a big reason why I think the cubs are going to be a ways off:
2012 Prospect Watch | cubs.com: Prospects
4 of the top 7 weren't in the system prior to the year and the top 6 guys are at least 2 years out, except Jackson, who shouldn't be on the list anymore. Also the only pitchers in the top 10 in the organization are
Vizcaino- had Tommy John, still recovering and have no idea what he'll be
McNutt- a reliever
Johnson- just drafted, no idea what he could be.
Also, Szcur is at best a 4th outfielder and Junior Lake is still very raw.
The cubs have some really good prospects, but not many pitching prospects which is one big need right now. That's how key the Dempster and Garza deals could have been if they had occurred prior to the deadline.
Hope they can figure some things out fast.