You can balance the strength of your legs if you like but I wouldn't assume that because one legs is stronger than the other that your power output while pedaling is unbalanced. Other than sprinting, you aren't limited by the strength in your legs as force required, even at high sustained power outputs, is relatively low.

Even if your pedaling is unbalanced, balancing the power output is unlikely to improve your performance as you'll still be limited by your cardiovascular system.