I admit that in playing I don't look too much at the power of wonders but rather the opportunity to achieve them and the accord of bonuses with the game I play. But I'll take a look at this to try to give you a little structured feedback.
There are three wonders of rennaissance that I can look back at already :
Golden Pavilion (Japan) : It is too weak for me (and the bonuses are too situational) compared to the other wonders of the era.
Meenakshi Temple (India) : For once, this one is a little too strong, especially the 33%
from 
purchase, too powerful when buying great people (I play with it often and my capital ends each time with an indecent size 
). I think 20% would be enough.Marae Arahurahu (French Polynesia) : Too powerful in my opinion (especially with tradition, the only way to have GMusicians in this era). But I like this wonder and what you made of it so i am not going to make any suggestion to limit it
.
bonus from 
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tourism with each acquisition of a tenet.
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and the creator of my favorite mod 
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