What Gozo and GSpector said - especially about the crew management and time period/randomization capabilities so people can do things like varying skin packs or other stuff over time. PLUS, please include the captain's personnel file type function like SH3 Commander had and, if at all possible,
please make sure it can parse/recognize/incorporate the additional personalized, custom log entries from the saved game files that can be made per this thread:
http://www.subsim.com/radioroom/show...220#post562220
It would be incredibly awesome if it would include a saved game log file editor capability that would allow you to easily make additional entries into your patrol logs between game sessions that would then show up in game the next time you loaded up the game (as discussed near the end of the thread noted above - would be a nice way to distinguish this from SH3 Commander by adding something that program didn't have

).
Can't wait for this to get here - when this and the patch arrive this game should really "move to the next level"