I would like most of all:
The ability to load a submitted turn in a simultaneous mode game and edit the turn and resubmit. Nothing more frustrating than saving your turn and remembering you forgot to do something so you must either submit what you have or start totally from scratch. Or your ally send you an email proposing to do something just after you did your turn.
Other enhancments that I would like:
- Make Ship Yard Limits on Total Resources, not a limit on each of the three components. This would reduce the speed at which organic races can produce ships. They would still have the benefit of using less metal. Almost every ship (other than organic race ones) around bound by the Ship Yards limit on Minerals.
- Allow use of components in Fleets. This would make Emergency Resupply and Propulsion components much more useful.
- Re-Engineer tbe Minefield Model (many threads on how this might be done)
- Re-Engineer the Intelligence Model. Make the Intelligence system modified by troops, security forces, Ships, Crew Experience, Happiness, etc. There should be alternate defenses for empires that cannot muster enough Counter Intelligence. In fact, I would advocate you eliminate Counter Intelligence and make facilties, troops and ship components the only defense against Counter Intelligence. No blanket defense, just localized defenses.