Firaxis seems committed to making this game as
special as Civ 4, though news just came out that the lead designer for Civ 5 joined another studio recently *...
depending on your viewpoint, that might actually be a good
thing!
The Classic play menu offers
things that aren't a part of the old games, and doesn't offer
things people have been asking for, begging for, screaming for (
depending), and is focused on making
things harder in ways the classic games had nothing to do with, and only some fans withing the community gravitated toward and created for themselves (including engine bug exploits, and
special hardware for rapid - spamming).