World War II: Atlantic and The Cold War seems to be going best so far :).

Anyone have any ideas what is the top missing part in games such as SH3 or SH5 for it to be done right?

I guess one need to twist it realism side to support multiplayer subs vs escorts. Would be tiresome to wait 30 minutes while the escort player zooms back and forth listening for the sub.

I've voted for a cold war setting but 1991+ would also be interesting (also in the Pacific).