Original sentence: The patches have also improved the AI over time.The top StarCraft players are fairly well-known and often appear in television commercials.Though the races were slightly imbalanced when the game was first released, the expansion pack and almost a dozen patches (of which four affected the gameplay mechanics) have balanced the three races
Edited sentence: The top StarCraft players are fairly well-known and often appear in television commericials.Though the races were slightly imbalanced when the game was first released (with the Zerg being too powerful and the Terran too weak), the expansion pack and almost a dozen patches (of which four affected the gameplay mechanics) have balanced the three races