yeah in campaign, archers start with 3.75 range and their range become longer by age upgrade.
and the reason people whine about too strong siege is siege units cannot be killed with ranged units.
in campaign, longbowmen and archers only differs with damage 1, and every archer can be building and siege destroyers with incendiary arrows upgrade. while incendiary arrows do not offer more damages.
and siege units had less ranged armors.