When a civilization gets as bloated as the Roman Empire did, society starts crumbling and the threat of civil war looms. This is the scenario Augustus was born into and would have to remedy. Caesar didn’t favor Augustus because he wanted him to walk the same path, but to be better and do more than he could. After all, Rome needed a leader not a savior.
Check out this Total War: Rome II’s Imperator Augustus Campaign Pack contents with this trailer. This DLC is free as part of the Emperor Edition. Don’t fret, if you already own Total War: Rome II, you’ll have your game upgraded for free to the Emperor Edition thus getting the DLC for free. Nothing beats free.