What if the Roman bonus was 3 +1% per age. The biggest place it hits hard is early on but it then becomes 6% in Imp Age. Now if this is super important then as well then I get why it might be too much but really the only food is farms most mining nodes are depleted leaving slightly faster wood and farms… for an infantry civ to ith some siege meanwhile Celts and Slavs also infantry and siege siege civs have had all along better wood or farms respectively