Kud, You're underestimating Vader's military tactics methinks. During Vader's Vengeance campaign, he was able to single handedly reverse the Empire's military situation post Yavin. He also nearly stopped the Rebels from destroying the Deathstar by attacking the Rebel fighters when they were MOST vulnerable, during the trench run. You spoke of "overkill" being poor tactics. I'm not sure where you get your "military expertise", but overwhelming force is a legitimate tactic, and it's harder to use effectively than you might think. Vader was the Supreme Commander in Chief of ALL Imperial military forces. Thrawn was just another guy in a white suit, just with more talent than the other guys in white suits.