I've seen a lot of people say that the game needs a new era added to it in order to cover the atomic and information ages of the previous games. Having played through a few games, I disagree completely. Instead, I think it would be much better to have the end of each era expanded to include some more techs and civics that represent eras people feel were skipped over or rushed through. This would also address the issue that people have about ages feeling too short.
Currently, the tech trees the antiquity era ends with iron working and mathematics, the exploration era ends with gunpowder and urban planning, and the modern era ends with rocketry. These feel like techs that most people should have access to before the era ends yet how it plays out is that they are more like "end game" bonuses for those who are far ahead. The current tech trees funnel your civ into these options rather than allowing for specialization, something that the civic tree actually does better with its civ specific, religious, and ideological trees. Rather than being treated as bonuses, expanding the eras would let more civs reach these techs and specialize rather than be funneled into these options.
Basically, I'm saying that Antiquity should feel like it ends when the Roman empire falls rather than its republic, Exploration should feel like it ends with colonial revolution or the Napoleonic wars rather than with the black plague, and Modern should feel like it ends with the fall of the Berlin Wall rather than the fall of the Ottoman Empire.
Currently, the tech trees the antiquity era ends with iron working and mathematics, the exploration era ends with gunpowder and urban planning, and the modern era ends with rocketry. These feel like techs that most people should have access to before the era ends yet how it plays out is that they are more like "end game" bonuses for those who are far ahead. The current tech trees funnel your civ into these options rather than allowing for specialization, something that the civic tree actually does better with its civ specific, religious, and ideological trees. Rather than being treated as bonuses, expanding the eras would let more civs reach these techs and specialize rather than be funneled into these options.
Basically, I'm saying that Antiquity should feel like it ends when the Roman empire falls rather than its republic, Exploration should feel like it ends with colonial revolution or the Napoleonic wars rather than with the black plague, and Modern should feel like it ends with the fall of the Berlin Wall rather than the fall of the Ottoman Empire.