Could be wishful thinking but I don't see how the DL doesn't improve over last year since the bar was pretty low.
Also, keep an eye on the UFAs the Cowboys signed. Cowboys tend to find a few good ones who make the roster. Steele and Hamilton (I think) were UFAs who made the team. I posted a thread with all the UFAs and a compilation of their greatest plays. Yeah, it is a highlight reel but they look pretty good. Keep an eye on LB Hines from Texas A&M (he looks really quick), Safety Coyle from Conn/Purdue, and DT Fallou from Oregon.
The pieces are there to build a better puzzle. More time to piece it together. So, I expect a better-looking puzzle this year.