It depends on who takes power after Stalin. Beria was a power-crazed monster, but he had scant loyalty to Marxism by the time Stalin died and saw East Germany in particular as a major drain on Soviet resources. So he may really have proved willing to withdraw from it and see a united & Finlandized Germany. If that could help secure stronger economic ties and technology (particularly consumer goods where the Soviets really lagged) from the west.
So for all his personal depravities and crimes Beria might be the most ''reform'' or ''pragmatically minded'' politburo member. Still in this case a lot of people at least in the higher ranks of the army & party are going to get a first class ticket to a camp in Siberia or Kazakhstan.
Or you could stick to the OTL fight for power after Stalin's death but butterfly away Khrushchev’s habit of latching on to strange schemes, like growing corn in land totally ill-suited to it. And make him a little more statesman like when it comes diplomacy.
Additionally make him more reform-minded and have him go further in denouncing Stalin, restore a greater degree of democracy at least within the CPSU itself. Also having him start more serious economic reforms. (Which at this early stage would work much better as the Soviet economy was still booming rather than stagnant/moribund as it was during Gorby’s time) also wouldn’t hurt matters.