I'd like to see three different eras to start from as in MTW. By the time I get to the higher tech levels, where I can enjoy the better units, I am bored with the retarded backstabbing diplomacy and the way the Romans and Egyptians have already mowed over every other faction. Starting later means I can utilize primo units for a few turns before my trusted ally decides to attack my capital with two units of peltasts while his real enemy sieges his last remaining province with two full stacks.