seasnake
Conquistador
Well, it depends heavily on what the wonders do vs. the cost of giving up that wonder for a possible other unique.
To use a Civ V example: If I'm picking Khmer because I'm the only Civ that can build Angkor Wat (which basically involved spending several turns of production in order to gain an ability that is a weaker version of either America's UA or Russian Kreposts) is that a better advantage than an army Impi (which were pure awesome/evil) as the Zulu?
So no, it's not automatically OP to have a unique wonder. Frankly, it might be a detriment to have so much production you have to funnel into this wonder to get the promised benefit.
To use a Civ V example: If I'm picking Khmer because I'm the only Civ that can build Angkor Wat (which basically involved spending several turns of production in order to gain an ability that is a weaker version of either America's UA or Russian Kreposts) is that a better advantage than an army Impi (which were pure awesome/evil) as the Zulu?
So no, it's not automatically OP to have a unique wonder. Frankly, it might be a detriment to have so much production you have to funnel into this wonder to get the promised benefit.