Melee citizens have been nerfed which is bad, because for example Athens and Sparta rely on these units, as they don't have any champion cavalry. Also, for some civs the citizen spearman is the only unit which can counter cavalry well (Britons, Mauryas). Furthermore it weakens melee mercenaries even more and using them didnt seem to have been a good strategy any more.
Siege units have already been rather hard to destroy, now even more.
As I said, Athens have the big disadvantage to not have any champion cavalry, so it might be a mistake to nerf the Iphicrates hero. This civilization relies on him.