Mages are not even close the class owning pvp atm. They are good but not at the top.
I guess you wouldn't know what the word "good" means, since you haven't got any perspective on it. Maybe it's because for once you got beaten by someone you think mages automatically needs buffing.
Mages have always been good, just compare them to enhancement shams last season. How many enhancement shams got above 2,2k last season in 3v3 bracket? Now compare that to how many mages got above the line.
I am not saying mages needs a buff. The fact is that mages has alot of talents that works very good in teamplay. But some classes are better in the meaning that they can do more damage and survive better on their own.
Nowhere did I say that we are really bad. I dont think mages ever been. Doesnt meen they should be either jsut because the enhcne shammys was before. Its liek saying women should rule the world now because equality between sexes has been so skewed before. Balance is the keyword here (and that is a dream that will never come true in wow sadly).