I think they should make some "grand" SH, meaning timeframe WWII all theaters (+ WWI) and concentrate on ai, environment modeling (sea, sonar, radar) multiplayer (multi station) and a powerfull editor with scripting abilities and heavy support for modders for sensor and platform modifications and the ability to add new playables. (so that one could make a cold war mod or even pre 20th century submersibles and code some dynamic campaigns). dream,dream, dream, joy, joy, joy ...
Silent flashpoint - you get the idea.