Frankly, I like a little imbalance in the game. And besides, what of the other leaders? Victoria, say, with the Imp/Fin combo. Or Catherine with Cre/Imp.
Personally, I'd rather see the UU, UB, and starting techs balance. Then, assign the traits as best as possible, trying to keep a little with the historical personalities that we are representing. Then, let the cards fall as they may. Persia and Rome may be a little bit stronger, but that's not a major issue--sometimes, I want a challenging civ, and if I'm going up a difficulty level, I may want a strong civ. Or, at least I'm sure there are people out there who may appreciate this.