Well, I certainly wouldn’t mind seeing the Soviet battleship leaving the Baltic Sea. Makes it easier to ferry troops to Leningrad when I don’t have to take out that annoying Red Fleet, and I can take it out when I spread out into the Atlantic. So it COULD potentially be useful to Germany to let the neutral Soviet fleet out of the Baltic. I’d have to see it in action first before passing judgment, though. Could be interesting… I may try it, see what happens.
I think that letting the Soviet BB hook up with the Royal Navy would be bad news for Germany. Better, as the Offspring song exhorts, to “keep 'em separated”.