Nuclear winter: There was a global warning in the civ4 but no nuclear winter after using bombs. I can't remember but I don't think that there were more ill people from radiation after using a nuke.
No bombarding from behind the mountains: I've seen the gameplay of the civ5 and cannons could bombard units two tiles away, I hope cannons won't be able to bombard through mountains.
Bunkers animations: In the civ4 units were only standing on the tiles and had defence bonus, I want actually to see them hiding in the bunkers and shooting from them, also I want bunkers to be able to bombard units one tile away.
More tactical places: There were forests and hill defence bonuses, but there were no tactical places like for example "the hot gates" from the 300 film.
Added cliffs: Why there are no cliffs in the civ? It should be impossible for cities to build ports when near cliffs and it should be impossible for ships to land units in those places, or for low tech ships like frigate to bombard cities on cliffs.
Also it would be cool because we could build bunkers with artillery cannons that could bombard ships.
Mixing units: mixing swordsmen with pikemen and macemen, so one army unit has all of them.
And the last thing, maybe not in the civ5 but in the civ6, make battles look like in the rome total war: So I can place the units where I want, and then attack from which side I want and how I want, give me the control of the battle.
Maybe I'll think of more later.
No bombarding from behind the mountains: I've seen the gameplay of the civ5 and cannons could bombard units two tiles away, I hope cannons won't be able to bombard through mountains.
Bunkers animations: In the civ4 units were only standing on the tiles and had defence bonus, I want actually to see them hiding in the bunkers and shooting from them, also I want bunkers to be able to bombard units one tile away.
More tactical places: There were forests and hill defence bonuses, but there were no tactical places like for example "the hot gates" from the 300 film.
Added cliffs: Why there are no cliffs in the civ? It should be impossible for cities to build ports when near cliffs and it should be impossible for ships to land units in those places, or for low tech ships like frigate to bombard cities on cliffs.
Also it would be cool because we could build bunkers with artillery cannons that could bombard ships.
Mixing units: mixing swordsmen with pikemen and macemen, so one army unit has all of them.
And the last thing, maybe not in the civ5 but in the civ6, make battles look like in the rome total war: So I can place the units where I want, and then attack from which side I want and how I want, give me the control of the battle.
Maybe I'll think of more later.