It seems like some of the mechanisms in the rules that allow for disarming may be a little too powerful in melee combat.
A single triumph or three advantage (or just two advantage if you're a Jedi with the Sum Djem talent) allows you to force an opponent to drop a weapon. If you've saved a maneuver, you can then pick up the weapon and voila, the battle is over.
Seems like this is a place where GM discretion needs to come in. Against Nemeses, the default should probably be "No, you may not disarm this opponent, even if you have the advantage to spend on it," except in cases where that would help rather than hinder the story.
Edited by DaverWattra