That's true, I tried to shift the East German borders a good bit east of OTL. For Yugoslavia, I had made them lose Croatia and Slovenia, but I think bosnia might be in the cards if the Wallies are commiting towards minimizing soviet influence. Either way, i doubt the Finns are going to escape the soviets, given how Germany will capitulate by May, there isn't any need to free up troops for the front.It's interesting but there are couple of points to consider. If the Allies do better in North via the British and in the centre owing to the Americans then the Soviets might have to accept a very different shape to their occupation zone in Germany. Also as already mentioned Yugoslavia will have a considerably different shape.
Also, wait, if the British are capturing Peedmunde, doesn't that mean they'll get their hands on Von Braun? in which case, will we see the union jack on the moon?
The western allies can really screw over the soviets by making sure poland is liberated, blocking the soviets from hungary and bulgaria, croatia and slovenia independence, with bosnia going to a new "Kingdom of Croatia" They could also keep an Enlarged Hungary purely to limited soviet influence further.
Albeit the above is just if they fully commit to screwing over the soviets in every way possible.