Well it could still be focused in the sense you are controlling a civilization through time. They could have just the main events that occurred throughout time. Do you consider Civiilization unfocused?
The game kinda plays the same at the start than it does in late game. While a few things change (warfare) and a few mechanics are added (religion, UN,...), overall economy or city management is very much handled similarly. Now compare it to CK2 with its characters, vicky2 with its economy and pops,...
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