He was mostly robotic and could calculate his spacial awareness, which yes, granted him use of it, but the General's ability was based on intelligence, not mastery. He used strategy and ambush tactics to get the drop on jedi, and he had so many tricks up his sleeve that made him unpredictable. He died to Obi-Wan because the Jedi knew what he was capable of and was able to easily defeat him in a one on one duel.

Any regular person would harm themselves with it. A weightless blade that resists movement takes a lot of training to be any good with it and it takes a sensitive trained in the force to unlock its full capability.

A character with cybernetics I would allow, yeah, but not a droid or cyborg swinging four sabers around.