Maybe something like For Honor could act as as a base idea. This is very hard to do with a traditional, moveset-based combat system and the reason why I think the 'perfect' star wars game gives the player a more direct way to control the Lightsabers' movement. You could kill an enemy by simply touching him with the Saber.

Always doing damage: what I really liked about the Jedi games is that the Saber had a constantly active hitbox, even outside of the attack animations.