There was no upgrades to make a big improvement. Martin won't step in and play at a Pro Bowl level and he shouldn't be expected to as a rookie. Other then Martin, there was no upgrades unless a 5th round rookie WR is considered an upgrade over Austin. I will admit that Austin was overdue to get get his walking papers considering his injuries and level of play, but I think he was still better than any 5th round rookie. Romo may disappoint fans if he doesn't bounce back from his injuries. I don't see the upgrades or talent added to the offense to predict a big improvement. Actually chances are just as good that the offense takes a step back IMO.
Maybe not. I see it differently. I think the OL will benefit at least from the extra competition as well as seasoning of Fred, Leary, Mack, Weems and Parnell. I think Martin will push. He moves better than I thought. He will be a horse. It will be tough for Leary to keep him out of the lineup. Fred did not play stellar pass blocking last year to be nice.
RB should be better with Dunbar back and seasoned some. One of the new guys should be valuable even if just depth.
Escobar will be improved. He and the RBs will benefit from Linehan.
WR will be slightly improved with the additions.
DL will be better with the addition of Melton and McClain. Add Lawrence to replace an injured Ware and hopefully get Spencer back and that's a better unit.
Not sure about LB. Maybe ok. Just not sure.
CB will be improved by playing to their strengths esp Carr.
Church has a year more and either Wilcox or Johnson will be an improvement.
How much improved remains to be seen but they will better on offense for sure and probably enough on Defense to make life interesting.