This is the post I referred to earlier.
Don't have to make noise to be successful. New England in 2001 should have taught everyone that lesson, as most of their contributors were mid-level guys that noone else wanted.
Cowboys upgraded their secondary by adding Newman in the draft along with Mitchell and resigning Edwards - combined with Ross will give Dallas one of the better secondaries in the league, upgraded the offensive line with the additions of Ryan Young in FA, Al Johnson in the draft and Parcells whipping the team back into shape. If this line can avoid the injuries of last year (Which is most likely since they were way overweight last year) then this unit becomes another plus.
Dallas upgraded the tight-end spot with the additions of Dan Campbell and James Witten (Draft - considered by most the best TE in the draft). Fullback was changed, from the underperforming Robert Thomas to Richie Anderson as well as Martin returning from injury.
Dallas also upgraded the linebacking core with the additions of James Bradie and Al Singleton. 2 Guys that fit the scheme that Zimmerman uses (Scheme is similar to Tampa Bays). Add Roy Williams with a year of experience and you'll notice a major upgrade on the secondary side.
QB and RB are the question marks - up to Parcells on that one.
So the big question is whether or not Parcells is the difference. My money goes on yes, expect a 7-9 or 8-8 season this year with a big jump next year...