What is the collective opinion on the best mod?

I am interested in more as oppposed to less realistic. I only recently installed this game. I don't know if these have been addressed but: the few things I have noted that seem to need changing are:

-Only Rome should be able to build roads.

-Only civilized powers should be able to build seige equipment.

-Playable Barbarian powers should be reduced to a single province with surrounding similar ethnic areas made rebel and much strenghened. This should make it much more difficult for any unification.

-Elephants should kill and not just distrupt friendly units when stampeding.

-Chariots should be weakened. They were antiquated by the time this game begins.

-Barbarians should not be able to build fleets: save for perhaps the Britons.