Yeah I agree, as it is, Siege units seems to have more and better abilities, like that +50% against fortified/cities thing which Archers lack (which probably is a good thing). Survivalism would make them too tanky though, but Woodsman or March or +1 Move would be okay. As it is only the earliest archer is useful (except for UUs) for an early rush and further Archery-line units I only use if I dp an early game rush and level them up a lot, especially if they used to be Scouts. Like in my current Rome game, I'm really not going to abandon my level 11 Composite who can also traverse rough terrain. He hits like a truck, has lots of promos and is very mobile.