One of the bigger gameplay issues that 0 A.D. has, in my opinion, is that booming = turtling. It means that every game is a complete boomfest to the lategame with little to no aggression after the occasional early rush. The problem stems from citizen soldiers and the fact that they are the best economic and military unit available at the same time.
The solution I've got is to increase the gather rate of female citizens to be equal or greater than that of citizen soldiers. This should offer