when you played IV, you were paying consideration to the immediate, the mid game, the long game, your potential victory conditions, what would be your prod., economic, science city..
Still true in Civ5. Although to be honest both Civ4 and Civ5 the game is won by the mid game.
how you would develop and choose those cities (eg. economic: religion, tile output, buildings, trade routes, how diplomacy would affect them, etc.)
Still true in Civ5, except no relgion but instead added the extra dynamic of city-states.
who you should develop as long term friends and who could buffer you against who
True, the AI with it's "Declare war against my best allies just because he built a space ship part" makes forming alliances pretty pointless. But there is already a mod that fixes this...
when you should expand to another continent
Still true in Civ5
and could you afford to keep the colonies or would you have to vassal them, if you were going to vassal them, how long would you have to support them for. if you vassalised the ai, could you give them all your techs or could they escape being vassals by expanding.
Not an option in Civ4 either at all until the expansions came...
who were your competitors and how could you alienate them from their friends if they were going for religious or diplo, could you get to their main culture city in time if they were going for culture.
Still true in Civ5
was it worth switching civics to placate a dangerous enemy.
In Civ5 this is done more strategically than tactically with Social Policies
could you outculture an enemy city and swamp it to take their crucial tiles and starve them.
True that aspect is gone but you still can develop culture so as to expand your borders faster or slower. But culture has other importance in Civ5 such as social policies.
literally dozens of competing layers of aspects that you had to balance to play the game successfully..
Still true for Civ5
now it's wait for the ai to attack (which they will but you won't know why), soak it up knowing they have no reserve, then walk in take their main cities and raze the rest when they quit and give you them. but that sounds like i'm blaming the AI for the game's inadequacies which i'm not...
AI is inadequate due to that strategy being viable. I think they should bring back an AI that you could actually allie with rather than always knowing they will DoW if you are weak or if you are winning
having given this game a really good go over the last few weeks i'm running out of enthusiasm. i really worried that this game would keep me in the house for 3months solid and that i'd be playing it for years obsessively.
the depth has gone. the depth has GONE. this isn't far away from civrev. WHO are they chasing after with this game? what demographic or group of gamers? even The Settlers is more "immersive" and complex than this.
Depth isn't gone at all, it is just different. Lots of depth in Civ5 that did not exist in Civ4 such as:
1) Strategic resources that can be used up
2) Better tactical warfare (if AI worked better)
3) Building maitenance
4) Culture, happiness, expansion, golden ages, and social policies all complexly intertwined
5) More complex city border expansion
6) More complex City-State dynamic
Just quit for a while and wait for the mods. By the way many already exist which vastly improve the game, including:
1) Economy mod
2) ActiveCityDefense
3) Emigration
4) Improved non-psycho diplomacy (dont remember actual name of this mod)
5) others...