I thought I heard combat is going to be realtime, but im going to place this anyways.
If combat is still divided by tactical/strategic, then let there be more of an impressive show on the board for strategic then a bunch of dots. Let us see some replays of the battle too!
If turn based will still be an option, allow tactical multiplayer as an OPTION in turn based multiplayer games, and even PBEM. Some of us realize it would take forever but still miss that aspect of the game in the multiplayer modes, all of them,
Saving during combat would be another great option! (And probably the big requirement... if you could save during turn based combat now, The above option would be completely availible!