The overall feel is you're in limbo between constructivist geometry and photmontage without doing either justice.
Is it just general Rodchenko work or specifically GD? There's a raft of great stamps in his photography alone. From this perspective the stamps look busy for the size (whatever size the stamp), although it's a good template which is one of the most important things for a stamp series. And i like the way you've tried to make a larger image when they're collected, which tend to work individually aswell. Strangely though it's not cohesive, just a bit messy.
I wouldn't cut half his face off on the cover, not without good reason.