In the past over in the Imperial Assult forum I’ve lobbied for the release of Navy and Army troopers. While the Stormtrooper Corp is easily the most recognizable branch of the Imperial military they are backed up by countless other fighting personnel.
The black uniformed Navy troopers act as a security force within the Imperial Fleet. They are primarily employed to repel and carry out boarding actions. However they can also see action providing support to Army and Stormtrooper units during a ground assault.
The grey or sometimes camo clad soldiers of the Imperial Army make up the bulk of Palpatine’s ground forces. Equipped and trained as light infantry they are most often deployed as garrisons or in policing actions. While they are competent fighters they often lack the fanatical devotion to the Empire seen among those in the Stormtrooper Corps. As such it is risky to solely deploy Army Units against the Alliance as there is a significant chance of defection or desertion caused by Rebel propaganda.
From a hobby perspective the inclusion of such units could give Imperial players a much needed break from painting nothing but Stormies.