It was the stance of the Soviets under Stalin that something like that would be a Bad Idea, because the Soviets probably would not have survived such an endeavor. I think it's debatable that they should have found some way to secure all of Germany, even if there was limited military conflict with the other Allies, for the sake of denazifying and a more economically viable GDR. Such an effort could easily have turned into a WW2.5 that the USSR would probably lose, so that's the "debatable" part.
It was the stance of the Soviets under Stalin that something like that would be a Bad Idea, because the Soviets probably would not have survived such an endeavor. I think it's debatable that they should have found some way to secure all of Germany, even if there was limited military conflict with the other Allies, for the sake of denazifying and a more economically viable GDR. Such an effort could easily have turned into a WW2.5 that the USSR would probably lose, so that's the "debatable" part.