More gameplay depth.
We have this wonderfully polished interface wich lets us command one of three stellar fleets in gorgeous beauty at strategic and tactic levels, wich we can hook up in multiplayer matches ar simply play vs customizable AIs inf fixed or random generate maps of various sizes.
Great. More!
One way would be expanding contend. Expanded technology trees, additional ships, additional races, single player campains, the works.
But depth refers not simply to contend. I am thinking about new mechanics wich make the game more replayable and compeditive.
I though about having some more or less random events enrich the game.
The first kind of events would be discoveries a player would run into whils exploring the universe.
Some could be simply good things, some bad things.
Some would give the player a choice but have different outcomes at random.
Maybe something uncommon like encountering a derelict ship wich may contain some out of the tech tree technology or valuable resources. Or it could open fire and not be as derelict as it appered. Or it could do something like steal your ship and try to take over more ships, leaving the system and possibly threaten the entire galaxy.
All those outcomes would be randomized (some perhaps more likely than others), so the player would never know what he is up against. Tempted by the possible rewards, scared by the possible negative consequences... what would you do?
The second kind of event would be game altering random events on planetary scale and also some on universal scale. There could be a food shortage, or a production bonus, or a galactic economy crash.
The third kind of event would be some mini quests. Maybe something like catching a pirate ship with a new experimental cloaking device, effectively cloaking the ship wich takes it down or a space monster appearing in the system.
These events should be numerous and some should happen frequently, but some rarely so that game has always some surprise in its sleeve.
You could secretly add new rare events with each patch.
And now it gets really nasty. You could alter the probailities of some events acording to player fleet size, economy, whatever on the fly as the game processes, using those events to balance out the game.
So a weaker player would get more positive events and a skillful play would get into trouble more frequently, dampening his advantage and helping the weak to come back. It would make the game more interesting for both sides.
"Where is your fleet? We have to gang up upon that one!"
"Strange i sent them into the phaselane already, they are kinda stuck somehow."
"There they are finally... hold on a second.... that looks strange... what happened to them?"
"They are attacking rethreat!"
Something like that.