The sins that have been committed at the alter of "Balance" would turn any devil's stomach.
I would argue the line of
so what in regards to UU and balance. They already unbalance the game, after all: anyone who's ever faced a horde of Roman Praetorians ("Axemen, huh? Cute." *squish*) can attest to that; and when Rifles roll around the sun never sets on those Redcoat armies, especially with Churchill at bat.
Benefits per country worked in RON, mostly. While I don't care about deviations from balance, there were points where they went too far. If I recall, either the Mayans or the Incas had some crazy city defense bonuses and wonder construction benefits in the vanilla game that allowed them to annihilate their enemies with extreme prejudice... and culture. In the expansion, America got a number of hefty bonuses that allowed them to steamroll the competition with red, white, and blue hard rockin' wonder and research benefits, and good old fashioned lead from their hordes of marines. Still, even then it was certainly possible to win against these opponents, just more difficult. It's a lot harder to accidentally make one faction a game killer in a complex game like Civ than I think people realize. In some ways, being really good at one aspect boxes you into a strategy, allowing other players to simply counter you in a more predictable manner. Break out of that trap by finding another way to run your country, and you have a more even playing field again.
That being said, let's not repeat the whole "Cossacks" thing, please, guys?
