True, Brood War may not have added new races or two new campaigns but Brood War did fix the play balance of Starcraft. I.E. unit costs, damage rates, hit points, and build times (The terran Goliath is finally useful). Rushing in Brood War is practically gone compared to what it was in Starcraft.
Blizzard did add six new units and added on to an already superb campaign from the first game.
P.S. Kerrigan is amazing
