Honestly, take out the atomic era. One of the reasons the late game is boring is because almost half of the eras in the game take place in a historical period of just over 100 years (modern era, atomic era, information era and future era - all of which are like ~150 years in our real world). Take away also the future era.
Most of the game's most important and impactful decisions happen in the early era. The late game, especially how civ6 is designed, is just about passing turns.
The late game can have two eras: modern era and information era. The modern era will be the 20th century and all the great inventions and events of that era. The information era will be the final age and may have some futuristic elements without the need for another era for that.
This way, each era will be more immersive as they will be larger and involve more events. IMO, each era should have 12 technologies in a not so linear technology tree in which civilizations that are further behind are not so penalized.
Most of the game's most important and impactful decisions happen in the early era. The late game, especially how civ6 is designed, is just about passing turns.
The late game can have two eras: modern era and information era. The modern era will be the 20th century and all the great inventions and events of that era. The information era will be the final age and may have some futuristic elements without the need for another era for that.
This way, each era will be more immersive as they will be larger and involve more events. IMO, each era should have 12 technologies in a not so linear technology tree in which civilizations that are further behind are not so penalized.