I think the combined running game could be even better. They won't have 1 guy with 1800 yards but they could have 2 with 900 each and a few yards from a 3rd guy.
This has been mentioned and it's possible but it's the tough yards on 3rd down and in the 4th quarter I'm concerned about. Murray excelled last season picking up those tough dirty yards on 3rd down in some critical situations that helped win some games the Cowboys were losing in previous seasons. Romo was able to hand the ball to Murray in some situations on 3rd and 2's and 3rd and 3's where in the past he was having to throw the ball. NFLN showed a series of tough runs Murray made last season that moved the chains late in games that other backs don't make. He fought off the initial contact and was able power and stiff arm his way forward and get the necessary yardage to keep the chains moving. There's not a lot that separates a 12-4 season from an 8-8 season. Not being able to pick up a first down in some short yardage situations can mean the difference between winning and losing a game late in the 4th quarter.
There were several games in past seasons that the Cowboys lost late because they couldn't move the chains in some short yardage situations. In 2011 prior to Murray's emergence the Cowboys blew a 24 point lead to Detroit because they had issues running the ball and it led to a second half Romo meltdown. Felix Jones only avenged 3.6 a carry in that game so the Cowboys abandoned the run and turned to the pass. The following week vs NE the Cowboys only needed a couple of first downs late in the 4th quarter to wrap that game up but were unable to move the football on the ground. It led to a punt and Brady driving the Pats down the field for the winning score. I mentioned the Detroit game in 2013 where both Randle and Tanner lost 4 yards on consecutive carries forcing a punt late in that game enabling the Lions to win the game in the final seconds. The Cowboys would have made the playoffs in 2011, 2012 and 2013 had they been able to run the football in a few games that Murray had yet to emerge in or missed due to injury.
A lot can change next season if the Cowboys start having trouble moving the chains on 3rd down forcing Romo into more passing situations. An injury or two on the OL can change a lot of things putting a premium on having an elite runner in the backfield. Although the OL is a solid run blocking unit they've had some issues in pass protection. Despite Romo attempting the fewest passes of his career in which he played at least 15 games he was sacked 29 times and injured on one of those sacks forcing him to miss a game. I'm not predicting doom and gloom next season but the potential for a disappointing season looms if the Cowboys go from #2 in rushing out of the top 5. A lot of things can be affected if there's any issues running the ball consistently next season especially in tough yardage and goal line situations. Murray had almost 2300 all purpose yards with 13 TD's that's a a lot of production that has to be replaced.
He energized the team last season and the Cowboys fed off him. His performance made Romo better, the defense better and the team showed mental toughness and played with the type of confidence we haven't seen in several years. Jerry thought anyone of hundred coaches could lead his team back in the 90's because it had talent. He may believe anyone of a hundred backs can produce behind his talented young OL and it's resulted in him taking one of the biggest gambles he's taken as the Cowboys owner by allowing his teams MVP from last season to walk and sign with Philly. We'll see what back the Cowboys draft because Jerry's not banking his season or future on the 3 average backs he has now. He knows with Romo's age and the concerns with his back that he can't risk putting the offense on his shoulders again. Moving on from Murray could all turn out for the better or it could blow up in the Cowboys face we'll find out next season.