But would the Soviets be willing to let that happen? They tended to react rather aggressively to different styles of Communism or reforms to the systems they had in place as we saw with Tito as well as the unrest events within the Warsaw pact. The question would be whether they'd be willing to kill their own regime for the sake of ideological purity.I can see the appeal of using a failed D-Day as the PoD; the Germans are already well on the back foot, the Red Army has completed its transformation into a hardened steamroller and Communist resistance movements are at their strongest and most popular across Europe. Plus it's a well known event in the war and less abstract than, say, AGC being destroyed in the Battle of Moscow. I think it's doable as well but with the toll the war will already have taken on the Soviets ITTL they would have to rely on the support of resistance movements much more to spread Communism throughout Europe and subsequently maintain it.
The Soviets could barely manage to feed Eastern Europe IOTL whilst still undergoing a great deal of suffering themselves, a Communist regime in France would be expected to help carry the burden of European reconstruction rather than simply becoming another satellite. In the aftermath you wouldn't so much have a Soviet-dominated Europe as a Europe which was broadly Soviet aligned but with some much more assertive and powerful actors in this expanded Warsaw pact. Some might not be so keen on Moscow remaining the spiritual centre of international Communism in such a scenario.