I doubt it. Mages may lose some of their standard flavor, and be turned into half-assed warriors that also cast spells sometimes, but they won't be getting the short end of the stick.
Now, if I would have to put my money on one class that I expect might end up unbalanced, it would be the ranger, because of the reliance on archery. I have a feeling archery will be much more difficult to do well then the other play styles.
We'll just have to wait and see.