I always find the BC period an exciting, fast moving part of the game. This is much of what makes this game so addictive. But in the modern era when you are dealing with dozens of cities, huge numbers of units [and AI opposing units], and other distractions, the game slows way down and so does the excitement/engagement meter for me. What mechanics are available to minimize this problem? I just tried accelerated combat [i.e. animations off] and this was a major help with no real downside. But what else can be done? It is possible to have multiunit air combat, but how do you do that with land units? I find automating workers to be more trouble than it is worth. I usually let the AI governor run my cities with only an occasion correction by me. But that still takes lots of time.