This can help their attack angle against enemy units, but is not really sufficient to enable a rearrangement of the units in the battleline. Once deployed, however, most armies can't do much to overcome a poor battleplan. A few armies are represented as being particularly maneuverable, even following deployment. The Byzantines and the original Mongol list could also. It made these enemies particularly dangerous for their opponents.
Some armies have formal command and control rules.
Many classical period armies have severe limitations in how to deploy and move heavy infantry units. These rules apply to the Greeks, Macedonians, Egyptians, etc. Heavy infantry units must deploy in a battleline, positioned close together and cannot wheel after deployment. To some degree, inferior command and control systems could be simulated by making the units in such armies larger. Sophisticated command and control systems are simulated by making the units smaller.