In case Firaxis really pays attention, a couple more points re. barbarian:
I understand some players enjoy barbarian activities. They even love raging barbarians. However, I think many players are also like me -- love some degree of barbarian activities that result in an increase in game variation/randomness and therefore create more fun for the players in early game. I don't believe they are included to restrict the early game strategy.
However, at higher difficulty levels (emperor and above, sometimes monarch in larger maps), barbarian/animals can become more than a nuisance. The main issue is, the AIs have all those huge bonuses vs the barbarians/animals (I just saw how an AI scout won a battle vs the barbarian archer, with only a loss of 0.3 strength last night), and they were given an archer to start with, and they expand much faster as well. On the other hand, human players generally start with a pathetic warrior. So often my warrior was killed in the first 20 rounds by those bears and panthers, which popped up so early in higher levels.
To make it worse, the goodie huts generate negative outcomes so often if you don't use scouts. Without a scout, popping a goodie is like taking a poison pill -- you may quite likely pop hostile barbs or if you leave it, the AIs will pop another tech. We know, AIs are given scouts, so as if they don't have enough early bonuses, they usually have a couple more techs and a hundred more pieces of gold than the human players because of that. That's just crazy.
So it basically comes down to one solution -- research hunting and archery early (hoping for copper or horses popped up in the map next to your first city IMHO is highly unreliable), then bronze work almost ASAP for whipping/chopping. I know, I know, people will tell me I need to adjust. My point is, if a game forces player to go a certain route at a higher level, it is not a well designed game.
Add a few more levels of barbarian activities, instead of only 3 levels (no, standard, or raging). Give more choices for players who like some barbarian activity but not too much.