I think Seattle and San Francisco have brought the NFL back to a type of reality where offense is concerned. Seattle, in particular, has the right formula...the one that worked for the 90's team in Dallas. The current Dallas offense has four guys in Romo, Murray, Bryant and Williams (with Witten and Beasley) that will have a lot to say on how far the team goes this year. The defense still looks like a work in progress, but they handled New Orleans surprisingly well (even though I think that the Saints have had issues for weeks now). The return of Spencer and the continued re-integration of Melton may help them ramp up the quarterback pressure. My real concern is the linebacking corps, which just can't seem to stay healthy long enough to really congeal. Some real voodoo with that group it seems...
On the running game...the last time the Cowboys made the playoffs (2009), they had a shade over 2100 yards rushing, and the ease with which they dismantled the Eagles (twice), made you think that they would really do some damage in the playoffs...but then the neglect of the o-line really came back to haunt them in Minnesota. The not-so-sexy line picks went over well with some...not so well with others, but it was long overdue. The last time they really had good line play was the 2007 season, as evidenced by the way they "should" have beaten New York and it's "four horseman" three times, instead of just twice!