I still want them to make it so that if you revive a Civ they catch up in tech level to make it more worthwhile to revive conquered civs. I mean, I get that liberating cities gets you Favor, which is great, but if you revive a civ that died in the medieval era they revive right back at that tech level (which is completely unrealistic that they would just revert to medieval technology after having been integrated with a more technologically advanced civ for several eras). It makes reviving them totally useless from a political standpoint as they are just easy fodder for advanced powers without your intervention.