Hey Narvik,
I agree with you on the Berlin NO for Russia. It is pretty silly. After all, once Berlin falls, isn’t the game pretty much over?
As for the No German subs in the Atlantic NO for UK, you can’t just go north of sea zones 86 and 87. There are convoy zones all along the African coast where Germany could station subs and bleed more money from the UK. The UK must keep those pesky U-boats away from those waters too.