In 1943, the Red Army (RKKA) decided to adopt shoulder boards instead of collar tabs for rank identification. This is an amusing change. Since the Russian Revolution, shoulder boards were frowned upon by the Bolsheviks as Tsarist and Imperialist relics, and hence they were discarded in the early Soviet uniforms.

As shown below, with the 1943 adaptation, an average Soviet soldier (left) resembles an Imperial Russian soldier (right).

I'm wondering, What are the reasons and motivations in the Soviet leadership behind this change?