I agree with Funak this is an overhaul mod. But I also felt intrigued by the Balance thing, for I was too annoyed with imbalancing in vanilla.
Corporations may be a thing in this mod, but I barely see them in my plays. New buildings, coherent military units, promotions based on roles, diplomats, soo diferent religions, a completely different happiness system, better distributed wonders, useful later explorers, more luxuries, interaction between plot improvements, more agressive and oportunistic ai, bonus for trade route completion, for expansion, for killings, influece coming and going, CS quests, spies special actions. And, yeah, civ iv diplomacy (not a big fan). Also, not obvious easy choices for techs order, culture/science focus, army composition... less tricky things like farming xp from CS without consequences. A care for balance on everything: resources, civ abilities, alternative paths, ...
Well, that sounds like a complete overhaul.
oh, for brainstorming names, yes.
Citizens Bold Project
Civilization Becomes Public
Civi Burst of Population
well, staying with the acronym doesn't give many options. How about?
Civ 5: Next Generation
Civ 5: Modders Revenge (not serious)
Civ 5: Strategist Paradise