well, new soldiers (but more in depth)
i think there should be a few new units (Yes i saw the thread that said post here but i feel this is more in depth and deserves another thread)
Well first off, there should be of course longer rounds if there are more units, say 45 seconds to a minute
Pikeman - Speed of infantry, slightly longer range than cavalry, more defense, less attack, 90 overload, longer build time, less consumption and more resources to build.
Knight - more health, defense, overload, and attack, slightly slower than cav but with more crop consumption, build times and resources to make (More crops and iron cost)
Berserker - slower than infantry, more attack than cav, less defense than inf, less range than cav, and more crop consumption than archer, more resource cost than cav.
If you have suggestions post below.