1. Units MORE, MORE, MORE. More variety in eras and variations. Give me the following:
An early form of cavalry with a lance rather than a bow.
Better artillery - I want to be able to bombard everything, not just defences.
A musket unit between the arquebus and the rifleman, something with a bayonet.
A generic Special Forces (commando) unit.
UAVs
Wider variety of ships. I want some form of combat ship between a Carvel and the Frigate, and where are the larger ships (Man-o-War etc). What about Dreadnaughts and modern frigates/destroyers/cruisers. We need more than one type of submarine. I also want a modern form of marine transport like the Wasp Class Amphibious Assault ship that can carry aircraft, helicopters and troops.
Missiles Cruise missiles and make it possible to be loaded on all types of modern marine vessels.
Helicopters A transport helicopter would be good.
Modern infantry that dont look like they belong in WWII, perhaps even a form of infantry that follows on from them. And where are my paratroopers?
Guerrillas. Why were they removed? I had so much fun with them when opening a campaign.
2. Airbases, Outposts and radar. I want to watch my borders and set up strategic outposts without having to build a city on an island that is only 1 or 2 squares in size.
3. Oil pipelines that must connect to cities with a port before you can sell it.
4. Colonies Bring them back for those hard to reach resources.
5. Infrastructure networks, I want to be able to form infrastructure networks. We have road and rail but what about power and telecommunications? I want to be able to establish a power grid so that I dont have to build a power station in every city. Make it so that one power station can power any number of cities provided the total population doesnt go above a set level (at which point you have to build more power stations to cope with demand). This would mean having to build transmission lines between cities and having to protect them during war. The same could apply to telecommunications. Just add another wire to the graphics for the power lines (or vice versa). The more cities are connected to the grid the more gold you can generate from trade/commerce and your military units get some sort of bonus to represent better command and control.