How many teams are great at both throwing and running? Notice that Bamas run offense has struggled as their pass offense has flourished. Look at their offensive linemen, they have changed as they have moved towards a strong passing offense. Mack Brown's biggest failure as a coach was thinking his pass offense could just change into a run offense just by calling run plays. We didn't recruit the offensive linemen to effectively run block, our guys were smaller, quicker and much more adapted to pass protection. They weren't built to moving someone out of the way.
If you want an effective running game and passing game, you are going to have vastly superior linemen, they don't grow on trees. Some guys are built for run blocking, some are built for pass blocking, very few are built for both. We are going to have to pick one or the other for the most part. At some point, our recruiting will get to the point we can get those linemen that big enough to be great run blockers and quick enough to be great pass blockers. You will know when we have those linemen, you will start to see them drafted in the first three round of the NFL Draft.