I find a certain final stage of the game a bit tedious.
It happens that the Eras 4 to 6, especially the 6, many teams, when they already ensure relatively control of the Top 10 of the final, stop making the cities grow, almost stopping the climb more and more levels, to avoid increasing the difficulty in the Final Era. Even, they are no longer interested in reaching the Top 1 in cities, and thus have the first turn to start the EG.
A solution to this could be: to give much more prestige than what is currently given to raise cities. Thus, who is insured in the Top 10, will want to continue raising their city to earn that extra of prestige.
Another way to improve competitiveness between cities is to standardize the amount of tons that in the EG, each city requests from each of the 48 RGs. Thus, it will be important to start the EG first and, therefore, to want to increase the cities more and more until the last moment.
I played in a city with 20 players that in Era 6 we were second and in the EG we finished 5. Against cities of 50 and 150 players. It's illogical!