I'd like to see:
1) a "chance of dying" or "chance of losing a hitpoint" thing for terrains, sort of like how galleys have a 50% chance of dying in sea and ocean.
For example, units moving through jungle and mountains have a 10% chance of losing a hitpoint, and through desert and tundra they have a 5% chance of losing a hitpoint. This would simulate the difficulties of crossing such rugged terrain without proper supplies. Of course, there should also be flags in the units panel to make them invulnerable to these risks, and techs like Sanintation and Motorized Transportation should eliminate the risks.
2) a "Weapon of Mass Destruction" flag for units. When selected this would cause a rep hit when the unit is used similar to what happens when a nuclear device is used. This sort of flag would enable the use of realistic chemical warheads on cruise missiles. Perhaps the amount of a rep hit can be selected; for example the use of a large nuclear device will cause more of a rep hit than the use of a battlefield nuke (see below). Of course, Nukes could always be unchecked as "WMD" for certain scenarios, but I'm not too sure why someone would want to do this.
3) a "blast radius" selector for nuclear weapons. This way early nukes can only effect a single tile, while more advanced ones can devastate the typical nine tiles. This would also enable realistic tactical nukes that only kill units in one tile, or doomsday weapons that devstate a 50x50 tile area.
4) a "cannot attack cities" flag would be useful, that way battlefield nukes can't be used against enemy cities. This really isn't too important.
5) the ability to allow the construction of multiple small wonders based on the number of cities. Specifically, I'd like to be able to construct a forbidden palace-like "Regional Capitol" for every 8 cities I have. This can be done by making a buch of wonders with different names, of course, but having a Provincial, Regional, State, etc. capitol sounds silly.
6) an expanded number of resources allowed on random maps.
7) the ability to use enemy infrastructure during war. This way invaders can take full advantage of enemy roads and railroads for movement, making a scortched earth retreat a good strategy for defenders. This wouldn't diminish the effectiveness of a ROP, however, since you wouldn't be able to use roads and railroads without a ROP while at peace.
8) some sort of multiple diplomacy, that way three or four warring nations can all come to the bargaining table at the same time rather than having to negotiate individually. This would also allow someone to act as a mediator and broker peace between to warring nations. This might be difficult to implement though without messing with hardcoded stuff.
9) the ability to create a multi-civ military alliance (like NATO).
10) the ability to use allied airfields and move through allied cities. This would probably require a new sort of diplomatic agreement; perhaps an "Alliance" or something like that.
11) Finally, and I doubt that this could be done but I'll mention it anyway, I'd like to see the ability to mod in various culture- or civ-specific things. For example, a civ specific interface, civ specific music, etc. This would just be an option for someone who wants to create the graphics or music, but not included with the game.
Sheesh... I began this post intending to only say a few things, but I kept thinking of stuff.
Anyway, I don't think that 1-7 would be too hard to implement, but after 8 I don't think there's much chance. 11 is the most unlikely. I could be wrong, though.
).
